Weekly Routing Table Report
Routing Analysis
cscora at dev.apnic.net
Thu Apr 19 14:09:46 EDT 2001
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 bgp-stats at lists.apnic.net
For a graphical representation, please see http://www.apnic.net/stats/bgp.
If you have any comments please contact Philip Smith <pfs at cisco.com>.
Routing Table Report 20 Apr, 2001
Analysis Summary
----------------
BGP routing table entries examined: 103456
Origin ASes present in the Internet Routing Table: 10626
Origin ASes announcing only one prefix: 3836
Transit ASes present in the Internet Routing Table: 1422
Average AS path length visible in the Internet Routing Table: 5.3
Max AS path length visible: 17
Illegal AS announcements present in the Routing Table: 34
Non-routable prefixes present in the Routing Table: 0
Prefixes being announced from the IANA Reserved Address blocks: 2
Number of addresses announced to Internet: 1239197280
Equivalent to 73 /8s, 220 /16s and 166 /24s
Percentage of available address space announced: 33.4
Percentage of allocated address space announced: 65.6
Percentage of available address space allocated: 51.0
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 15690
Prefixes being announced from the APNIC address blocks: 14205
APNIC Region origin ASes present in the Internet Routing Table: 1232
APNIC Region origin ASes announcing only one prefix: 436
APNIC Region transit ASes present in the Internet Routing Table: 197
Average APNIC Region AS path length visible: 5.1
Max APNIC Region AS path length visible: 14
Number of APNIC addresses announced to Internet: 71391058
Equivalent to 4 /8s, 65 /16s and 87 /24s
Percentage of available APNIC address space announced: 70.2
APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239, 17408 - 18431
APNIC Address Blocks 61/8, 202/7, 210/7 and 218/8
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 71577
Prefixes being announced from the ARIN address blocks: 49051
ARIN Region origin ASes present in the Internet Routing Table: 6462
ARIN Region origin ASes announcing only one prefix: 1911
ARIN Region transit ASes present in the Internet Routing Table: 683
Average ARIN Region AS path length visible: 5.2
Max ARIN Region AS path length visible: 14
Number of ARIN addresses announced to Internet: 180570501
Equivalent to 10 /8s, 195 /16s and 73 /24s
Percentage of available ARIN address space announced: 82.8
ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106
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
ARIN Address Blocks 63/8, 64/7, 66/8, 199/8, 200/8, 204/6, 208/7 and 216/8
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 16155
Prefixes being announced from the RIPE address blocks: 12841
RIPE Region origin ASes present in the Internet Routing Table: 2939
RIPE Region origin ASes announcing only one prefix: 1489
RIPE Region transit ASes present in the Internet Routing Table: 540
Average RIPE Region AS path length visible: 5.9
Max RIPE Region AS path length visible: 17
Number of RIPE addresses announced to Internet: 96663513
Equivalent to 5 /8s, 194 /16s and 247 /24s
Percentage of available RIPE address space announced: 82.3
RIPE AS Blocks 1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614
2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
20480 - 21503
RIPE Address Blocks 62/8, 193/8, 194/7, 212/7 and 217/8
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /19 equiv Description
1221 2001 684 Telstra
2764 425 147 connect.com.au pty ltd
703 390 205 UUNET Technologies, Inc.
2907 363 875 SINET Japan
4755 301 110 VSNL India
4538 235 1038 China Education and Research
7539 228 102 Delegated to TWNIC for subseq
4134 188 623 Data Communications Bureau
4766 187 770 KORnet Powered BY Korea Telec
7474 178 85 Optus Communications
9269 161 22 Hong Kong CTI
1237 156 70 System Engineering Research I
4740 152 10 Ozemail
7657 152 12 The Internet Group Limited
17561 151 61 Internet service provision to
7545 147 10 TPG Internet Pty Ltd
4786 129 7 NetConnect Communications Pty
7586 124 9 Paradox Digital Pty. Ltd
7617 124 46 One.Net Pty Ltd
9797 122 10 Asia Online Australia
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /19 equiv Description
702 480 670 UUNET Technologies, Inc.
3301 389 337 TeliaNet Sweden
1270 280 448 UUNET Germany
1257 277 247 Swipnet AB
680 207 914 Deutschef Forschurgsnetz
3215 207 228 RAIN
5515 190 336 Sonera Finland
719 189 146 LANLINK
786 185 959 JANET IP Service
3320 160 710 Deutsche Telekom AG
5400 129 41 Concert Internet Plus Europea
517 127 134 Xlink
3303 123 298 Swisscom
2856 122 388 BTnet UK Regional network
1290 117 206 PSINet UK Ltd.
8708 113 5 Romania Data System
3352 108 241 Ibernet, Internet A
1849 107 223 UUNET UK (formerly PIPEX)
1267 97 978 IUnet S.p.A
1901 97 77 EUnet Austria
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /19 equiv Description
701 2426 3626 UUNET Technologies, Inc.
705 1612 69 UUNET Technologies, Inc.
7018 962 3190 AT&T
1 960 4495 BBN Planet
7046 801 552 UUNET Technologies, Inc.
1239 641 1603 Sprint ICM-Inria
2914 608 1210 Verio, Inc.
3561 561 1264 Cable & Wireless USA
174 533 2751 PSINet Inc.
3549 505 514 Global Crossing
4293 480 52 Cable & Wireless USA
209 449 707 Qwest
690 424 43 Merit Network
2548 400 514 Digital Express Group, Inc.
3908 376 262 Supernet, Inc.
8151 362 218 UniNet S.A. de C.V.
3967 336 226 Exodus Communication
4323 336 136 Time Warner Communications, I
8013 336 54 PSINet Ltd. Canada
11371 332 50 Rhythms NetConnections
Global Per AS prefix count summary
----------------------------------
ASN No of nets /19 equiv Description
701 2426 3626 UUNET Technologies, Inc.
1221 2001 684 Telstra
705 1612 69 UUNET Technologies, Inc.
7018 962 3190 AT&T
1 960 4495 BBN Planet
7046 801 552 UUNET Technologies, Inc.
1239 641 1603 Sprint ICM-Inria
2914 608 1210 Verio, Inc.
3561 561 1264 Cable & Wireless USA
174 533 2751 PSINet Inc.
3549 505 514 Global Crossing
702 480 670 UUNET Technologies, Inc.
4293 480 52 Cable & Wireless USA
209 449 707 Qwest
2764 425 147 connect.com.au pty ltd
690 424 43 Merit Network
2548 400 514 Digital Express Group, Inc.
703 390 205 UUNET Technologies, Inc.
3301 389 337 TeliaNet Sweden
3908 376 262 Supernet, Inc.
List of Unregistered ASNs (Global)
----------------------------------
Bad AS Designation Network Transit AS Description
2027 UNALLOCATED 150.185.0.0/16 10530 Interpacket Group, I
2027 UNALLOCATED 150.185.128.0/18 8143 Publicom Corp.
2027 UNALLOCATED 150.186.0.0/16 10530 Interpacket Group, I
2027 UNALLOCATED 150.187.0.0/16 10530 Interpacket Group, I
2027 UNALLOCATED 150.188.0.0/16 10530 Interpacket Group, I
2027 UNALLOCATED 150.189.0.0/16 10530 Interpacket Group, I
1877 UNALLOCATED 192.108.196.0/24 1800 SPRINT
1877 UNALLOCATED 192.108.209.0/24 1880 Stupi, house man's
1877 UNALLOCATED 192.108.210.0/24 1880 Stupi, house man's
1877 UNALLOCATED 192.108.214.0/24 1800 SPRINT
5757 UNALLOCATED 192.239.13.0/24 701 UUNET Technologies,
64561 PRIVATE 202.139.40.192/27 7474 Optus Communications
64537 PRIVATE 202.139.47.96/29 7474 Optus Communications
64537 PRIVATE 202.139.116.0/25 7474 Optus Communications
64532 PRIVATE 202.139.116.128/27 7474 Optus Communications
64532 PRIVATE 202.139.116.192/27 7474 Optus Communications
64532 PRIVATE 202.139.116.224/29 7474 Optus Communications
64532 PRIVATE 202.139.116.240/29 7474 Optus Communications
64532 PRIVATE 202.139.116.248/29 7474 Optus Communications
64534 PRIVATE 202.139.121.0/28 7474 Optus Communications
64537 PRIVATE 202.139.168.192/27 7474 Optus Communications
64543 PRIVATE 202.139.182.0/28 7474 Optus Communications
65535 PRIVATE 203.24.169.0/24 17486 Swiftel Communicatio
65500 PRIVATE 203.166.86.0/24 10084 Western Australian I
64553 PRIVATE 203.202.2.72/29 7474 Optus Communications
64555 PRIVATE 203.202.9.88/29 7474 Optus Communications
64534 PRIVATE 203.202.9.128/25 7474 Optus Communications
64548 PRIVATE 203.202.10.0/27 7474 Optus Communications
64560 PRIVATE 203.202.14.80/28 7474 Optus Communications
64553 PRIVATE 203.202.15.16/28 7474 Optus Communications
5555 UNALLOCATED 205.110.64.0/24 721 DLA Systems Automati
5555 UNALLOCATED 205.110.68.0/22 721 DLA Systems Automati
5555 UNALLOCATED 205.110.72.0/21 721 DLA Systems Automati
5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies,
Advertised IANA Reserved Addresses
----------------------------------
Network Origin AS Description
223.255.46.0/24 6853 GLOBAL-ONE-PORTUGAL
223.255.70.0/24 6853 GLOBAL-ONE-PORTUGAL
Number of prefixes announced per prefix length (Global)
-------------------------------------------------------
/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:22 /9:4 /10:4 /11:10 /12:29
/13:67 /14:206 /15:326 /16:6939 /17:1125 /18:2106
/19:6583 /20:5060 /21:4421 /22:6744 /23:8626 /24:59774
/25:275 /26:405 /27:216 /28:196 /29:134 /30:125
/31:1 /32:58
Number of /24s announced per /8 block (Global)
----------------------------------------------
9:3 12:354 13:10 15:1 17:1 24:709
26:1 32:12 38:7 44:3 47:1 53:2
55:1 57:11 61:28 62:131 63:1916 64:1461
65:954 66:274 128:30 129:112 130:20 131:26
132:9 133:1 134:168 135:8 136:16 137:117
138:247 139:52 140:149 141:176 142:61 143:41
144:131 145:9 146:132 147:134 148:154 149:134
150:27 151:175 152:801 153:33 154:15 155:77
156:39 157:109 158:61 159:83 160:28 161:56
162:61 163:136 164:129 165:127 166:177 167:134
168:82 169:34 170:219 171:2 192:5410 193:1949
194:2046 195:770 196:406 198:3656 199:3384 200:1909
202:2471 203:4989 204:3376 205:2246 206:2719 207:2844
208:2905 209:3202 210:481 211:190 212:847 213:408
214:9 215:11 216:2936 217:196 223:2
End of report
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