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Weekly Routing Table Report

  • From: Routing Analysis Role Account
  • Date: Fri Feb 22 13:17:42 2008

This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to [email protected]

For historical data, please see http://thyme.apnic.net.

If you have any comments please contact Philip Smith <[email protected]>.

Routing Table Report   04:00 +10GMT Sat 23 Feb, 2008

Report Website:     http://thyme.apnic.net
Detailed Analysis:  http://thyme.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              246872
    Prefixes after maximum aggregation:                          124953
    Deaggregation factor:                                          1.98
    Unique aggregates announced to Internet:                     119515
Total ASes present in the Internet Routing Table:                 27438
    Prefixes per ASN:                                              9.00
Origin-only ASes present in the Internet Routing Table:           23927
Origin ASes announcing only one prefix:                           11617
Transit ASes present in the Internet Routing Table:                3511
Transit-only ASes present in the Internet Routing Table:             72
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      19
    Max AS path prepend of ASN (29642)                               15
Prefixes from unregistered ASNs in the Routing Table:                59
    Unregistered ASNs in the Routing Table:                          15
Number of 32-bit ASNs allocated by the RIRs:                         46
Prefixes from 32-bit ASNs in the Routing Table:                       9
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            927
Number of addresses announced to Internet:                   1835598080
    Equivalent to 109 /8s, 105 /16s and 1 /24s
    Percentage of available address space announced:               49.5
    Percentage of allocated address space announced:               60.8
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               70.3
Total number of prefixes smaller than registry allocations:      116852

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                    56515
    Total APNIC prefixes after maximum aggregation:               20789
    APNIC Deaggregation factor:                                    2.72
Prefixes being announced from the APNIC address blocks:           54018
    Unique aggregates announced from the APNIC address blocks:    22875
APNIC Region origin ASes present in the Internet Routing Table:    3133
    APNIC Prefixes per ASN:                                       17.24
APNIC Region origin ASes announcing only one prefix:                826
APNIC Region transit ASes present in the Internet Routing Table:    481
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         15
Number of APNIC addresses announced to Internet:              330881472
    Equivalent to 19 /8s, 184 /16s and 217 /24s
    Percentage of available APNIC address space announced:         75.9

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
APNIC Address Blocks    58/8,  59/8,  60/8,  61/8, 114/8, 115/8, 116/8,
                       117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8,
                       124/8, 125/8, 126/8, 202/8, 203/8, 210/8, 211/8,
                       218/8, 219/8, 220/8, 221/8, 222/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    115756
    Total ARIN prefixes after maximum aggregation:                65427
    ARIN Deaggregation factor:                                     1.77
Prefixes being announced from the ARIN address blocks:            84476
    Unique aggregates announced from the ARIN address blocks:     33341
ARIN Region origin ASes present in the Internet Routing Table:    12151
    ARIN Prefixes per ASN:                                         6.95
ARIN Region origin ASes announcing only one prefix:                4686
ARIN Region transit ASes present in the Internet Routing Table:    1149
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          15
Number of ARIN addresses announced to Internet:               356278656
    Equivalent to 21 /8s, 60 /16s and 97 /24s
    Percentage of available ARIN address space announced:          73.2

ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959
ARIN Address Blocks     24/8,  63/8,  64/8,  65/8,  66/8,  67/8,  68/8,
                        69/8,  70/8,  71/8,  72/8,  73/8,  74/8,  75/8,
                        76/8,  96/8,  97/8,  98/8,  99/8, 173/8, 174/8,
                       199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8,
                       216/8,

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                     52449
    Total RIPE prefixes after maximum aggregation:                32857
    RIPE Deaggregation factor:                                     1.60
Prefixes being announced from the RIPE address blocks:            47511
    Unique aggregates announced from the RIPE address blocks:     31891
RIPE Region origin ASes present in the Internet Routing Table:    10944
    RIPE Prefixes per ASN:                                         4.34
RIPE Region origin ASes announcing only one prefix:                5730
RIPE Region transit ASes present in the Internet Routing Table:    1652
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               346376192
    Equivalent to 20 /8s, 165 /16s and 72 /24s
    Percentage of available RIPE address space announced:          79.4

RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055
RIPE Address Blocks     62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 193/8,
                       194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                   18675
    Total LACNIC prefixes after maximum aggregation:               4729
    LACNIC Deaggregation factor:                                   3.95
Prefixes being announced from the LACNIC address blocks:          17075
    Unique aggregates announced from the LACNIC address blocks:    9357
LACNIC Region origin ASes present in the Internet Routing Table:    908
    LACNIC Prefixes per ASN:                                      18.81
LACNIC Region origin ASes announcing only one prefix:               302
LACNIC Region transit ASes present in the Internet Routing Table:   153
Average LACNIC Region AS path length visible:                       3.9
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              48446720
    Equivalent to 2 /8s, 227 /16s and 61 /24s
    Percentage of available LACNIC address space announced:        48.1

LACNIC AS Blocks       26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks  186/8, 187/8, 189/8, 190/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   3417
    Total AfriNIC prefixes after maximum aggregation:              1133
    AfriNIC Deaggregation factor:                                  3.02
Prefixes being announced from the AfriNIC address blocks:          3860
    Unique aggregates announced from the AfriNIC address blocks:   1806
AfriNIC Region origin ASes present in the Internet Routing Table:   229
    AfriNIC Prefixes per ASN:                                     16.86
AfriNIC Region origin ASes announcing only one prefix:               73
AfriNIC Region transit ASes present in the Internet Routing Table:   45
Average AfriNIC Region AS path length visible:                      3.7
    Max AfriNIC Region AS path length visible:                       14
Number of AfriNIC addresses announced to Internet:             10006016
    Equivalent to 0 /8s, 152 /16s and 174 /24s
    Percentage of available AfriNIC address space announced:       29.8

AfriNIC AS Blocks      36864-37887 & ERX transfers
AfriNIC Address Blocks  41/8, 196/8,

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4755     1580        386          81   Videsh Sanchar Nigam Ltd. Aut
 9583     1148        109          21   Sify Limited
 9498     1130        550          63   BHARTI BT INTERNET LTD.
17488      992         64          89   Hathway IP Over Cable Interne
 4766      854       5495         345   Korea Telecom (KIX)
 4134      853      12089         313   CHINANET-BACKBONE
23577      811         34         696   Korea Telecom (ATM-MPLS)
18101      712        128          65   Reliance Infocom Ltd Internet
 9829      584        449          11   BSNL National Internet Backbo
 4812      553        940          85   China Telecom (Shanghai)

Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 7018     1427       5988         992   AT&T WorldNet Services
 4323     1375       1011         363   Time Warner Telecom
 2386     1362        634         839   AT&T Data Communications Serv
11492     1206        138          30   Cable One 
 7011     1060        308         613   Citizens Utilities 
18566     1042        296          10   Covad Communications 
 6197     1034        754         511   BellSouth Network Solutions, 
  174      984       6835         815   Cogent Communications
 6478      927        237         112   AT&T Worldnet Services 
20115      887        808         484   Charter Communications 

Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8452      398        188           7   TEDATA
 3292      396       1778         361   TDC Tele Danmark
 3301      335       1443         305   TeliaNet Sweden
 3320      325       7045         269   Deutsche Telekom AG
 8866      289         78          24   Bulgarian Telecommunication C
 8551      279        267          42   Bezeq International
  680      275       2046         256   DFN-IP service G-WiN
 3215      273       2607          94   France Telecom Transpac
 8708      271        420         241   Romania Data Systems S.A.
 6746      269        128         247   Dynamic Network Technologies,

Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151     1170       2438         218   UniNet S.A. de C.V. 
11830      555        299           9   Instituto Costarricense de El
 7303      444        216          58   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
11172      400        115          66   Servicios Alestra S.A de C.V 
 6471      396         85          40   ENTEL CHILE S.A. 
10620      366         96          49   TVCABLE BOGOTA 
14117      352         25          15   Telefonica del Sur S.A. 
22047      323        270          14   VTR PUNTO NET S.A. 
10481      301        120          10   Prima S.A. 

Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
24863      411         60          31   LINKdotNET AS number
 3741      282        869         224   The Internet Solution 
20858      210         34           3   EgyNet
 2018      158        276         117   Tertiary Education Network 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      129          9          15   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
33776       99          6           7   Starcomms Nigeria Limited
24835       90         48           7   RAYA Telecom - Egypt
29571       80         13           7   Ci Telecom Autonomous system 

Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4755     1580        386          81   Videsh Sanchar Nigam Ltd. Aut
 7018     1427       5988         992   AT&T WorldNet Services
 4323     1375       1011         363   Time Warner Telecom
 2386     1362        634         839   AT&T Data Communications Serv
11492     1206        138          30   Cable One 
 8151     1170       2438         218   UniNet S.A. de C.V. 
 9583     1148        109          21   Sify Limited
 9498     1130        550          63   BHARTI BT INTERNET LTD.
 7011     1060        308         613   Citizens Utilities 
18566     1042        296          10   Covad Communications 

Complete listing at http://thyme.apnic.net/current/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
11492      1206        1176      Cable One 
 9583      1148        1127      Sify Limited
 9498      1130        1067      BHARTI BT INTERNET LTD.
18566      1042        1032      Covad Communications 
 4323      1375        1012      Time Warner Telecom
 8151      1170         952      UniNet S.A. de C.V. 
17488       992         903      Hathway IP Over Cable Interne
 6478       927         815      AT&T Worldnet Services 
22773       874         809      Cox Communications, Inc.
19262       884         733      Verizon Global Networks 

Complete listing at http://thyme.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS  Designation  Network              Transit AS  Description
15190   UNALLOCATED   63.98.176.0/24         701       UUNET Technologies, 
18506   UNALLOCATED   63.107.123.0/24      33286       Turlock Irrigation D
16886   UNALLOCATED   63.109.3.0/24         1239       Sprint 
16886   UNALLOCATED   63.167.139.0/24       1239       Sprint 
33526   UNALLOCATED   64.128.26.0/24        4323       Time Warner Telecom
21624   UNALLOCATED   65.163.176.0/24        701       UUNET Technologies, 
65000   PRIVATE       92.62.240.0/20       24750       Cable Internet Syste
64601   PRIVATE       118.232.77.0/24       9924       Taiwan Fixed Network
64601   PRIVATE       118.232.78.0/24       9924       Taiwan Fixed Network
64601   PRIVATE       118.232.224.0/21      9924       Taiwan Fixed Network

Complete listing at http://thyme.apnic.net/current/data-badAS

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
24.48.10.0/23        19548     Adelphia Business Solutions 
24.48.12.0/22        19548     Adelphia Business Solutions 
24.48.80.0/21        19548     Adelphia Business Solutions 
24.54.224.0/19       20001     HoldCo LLC - Road Runner 
24.142.40.0/21        7018     AT&T WorldNet Services
24.142.160.0/19       7018     AT&T WorldNet Services
24.246.0.0/17         7018     AT&T WorldNet Services
24.246.128.0/18       7018     AT&T WorldNet Services
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
62.72.160.0/19       24896     IntellCOM Provider LIR, Kiev,

Complete listing at http://thyme.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:19       /9:9       /10:16      /11:39      /12:134     
/13:276     /14:494     /15:985     /16:9773    /17:4253    /18:7119    
/19:15160   /20:17298   /21:16433   /22:20813   /23:21929   /24:129455  
/25:877     /26:1109    /27:568     /28:95      /29:9       /30:1       
/31:0       /32:8       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

  ASN   No of nets  Total ann.   Description
11492     1194          1206      Cable One 
 2386     1068          1362      AT&T Data Communications Serv
18566     1023          1042      Covad Communications 
 9583      984          1148      Sify Limited
 7011      943          1060      Citizens Utilities 
 4755      932          1580      Videsh Sanchar Nigam Ltd. Aut
 6478      926           927      AT&T Worldnet Services 
17488      807           992      Hathway IP Over Cable Interne
 9498      803          1130      BHARTI BT INTERNET LTD.
23577      802           811      Korea Telecom (ATM-MPLS)

Complete listing at http://thyme.apnic.net/current/data/sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   4:9         8:101      12:1983     13:1        15:21       16:3      
  17:6        18:13       20:35       24:1027     25:1        32:61     
  33:4        38:390      40:65       41:597      44:2        47:8      
  52:3        55:3        56:3        57:22       58:522      59:422    
  60:407      61:988      62:1079     63:1950     64:3357     65:2363   
  66:3635     67:1131     68:629      69:2104     70:483      71:123    
  72:1452     73:6        74:842      75:236      76:258      77:556    
  78:499      79:80       80:892      81:824      82:586      83:355    
  84:522      85:1006     86:393      87:650      88:295      89:1166   
  90:12       91:1033     92:134      93:79       95:2        96:13     
  97:10       98:74       99:3       114:1       115:1       116:534    
 117:262     118:78      119:154     121:439     122:706     123:289    
 124:804     125:1097    128:310     129:198     130:132     131:399    
 132:69      133:9       134:188     135:37      136:220     137:117    
 138:156     139:63      140:489     141:108     142:377     143:265    
 144:340     145:53      146:335     147:131     148:486     149:178    
 150:124     151:148     152:95      153:131     154:11      155:290    
 156:201     157:250     158:162     159:217     160:230     161:100    
 162:203     163:197     164:567     165:425     166:292     167:307    
 168:583     169:133     170:432     171:28      172:3       189:155    
 190:1399    192:5765    193:4100    194:3254    195:2332    196:997    
 198:3770    199:3191    200:5458    201:1277    202:7584    203:7794   
 204:3971    205:2059    206:2413    207:2728    208:3146    209:3557   
 210:2529    211:1032    212:1284    213:1585    214:445     215:47     
 216:4155    217:1200    218:337     219:399     220:1099    221:402    
 222:308    

End of report