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From: Routing Analysis Role Account (no email)
Date: Fri Apr 04 2008 - 14:07:56 EDT
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
For historical data, please see http://thyme.apnic.net.
If you have any comments please contact Philip Smith <>.
Routing Table Report 04:00 +10GMT Sat 05 Apr, 2008
Report Website: http://thyme.apnic.net
Detailed Analysis: http://thyme.apnic.net/current/
Analysis Summary
----------------
BGP routing table entries examined: 251663
Prefixes after maximum aggregation: 126431
Deaggregation factor: 1.99
Unique aggregates announced to Internet: 122544
Total ASes present in the Internet Routing Table: 27824
Prefixes per ASN: 9.04
Origin-only ASes present in the Internet Routing Table: 24255
Origin ASes announcing only one prefix: 11268
Transit ASes present in the Internet Routing Table: 3569
Transit-only ASes present in the Internet Routing Table: 80
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 18
Max AS path prepend of ASN (43380) 13
Prefixes from unregistered ASNs in the Routing Table: 24961
Unregistered ASNs in the Routing Table: 1890
Number of 32-bit ASNs allocated by the RIRs: 47
Prefixes from 32-bit ASNs in the Routing Table: 8
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 850
Number of addresses announced to Internet: 1856218272
Equivalent to 110 /8s, 163 /16s and 164 /24s
Percentage of available address space announced: 50.1
Percentage of allocated address space announced: 61.5
Percentage of available address space allocated: 81.4
Percentage of address space in use by end-sites: 71.1
Total number of prefixes smaller than registry allocations: 120069
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 42554
Total APNIC prefixes after maximum aggregation: 13541
APNIC Deaggregation factor: 3.14
Prefixes being announced from the APNIC address blocks: 54788
Unique aggregates announced from the APNIC address blocks: 23781
APNIC Region origin ASes present in the Internet Routing Table: 1917
APNIC Prefixes per ASN: 28.58
APNIC Region origin ASes announcing only one prefix: 552
APNIC Region transit ASes present in the Internet Routing Table: 351
Average APNIC Region AS path length visible: 3.7
Max APNIC Region AS path length visible: 15
Number of APNIC addresses announced to Internet: 339369312
Equivalent to 20 /8s, 58 /16s and 93 /24s
Percentage of available APNIC address space announced: 77.8
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: 107122
Total ARIN prefixes after maximum aggregation: 58976
ARIN Deaggregation factor: 1.82
Prefixes being announced from the ARIN address blocks: 85863
Unique aggregates announced from the ARIN address blocks: 34029
ARIN Region origin ASes present in the Internet Routing Table: 11687
ARIN Prefixes per ASN: 7.35
ARIN Region origin ASes announcing only one prefix: 4545
ARIN Region transit ASes present in the Internet Routing Table: 1038
Average ARIN Region AS path length visible: 3.4
Max ARIN Region AS path length visible: 15
Number of ARIN addresses announced to Internet: 361937024
Equivalent to 21 /8s, 146 /16s and 184 /24s
Percentage of available ARIN address space announced: 74.4
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: 53958
Total RIPE prefixes after maximum aggregation: 33261
RIPE Deaggregation factor: 1.62
Prefixes being announced from the RIPE address blocks: 49136
Unique aggregates announced from the RIPE address blocks: 32912
RIPE Region origin ASes present in the Internet Routing Table: 11137
RIPE Prefixes per ASN: 4.41
RIPE Region origin ASes announcing only one prefix: 5813
RIPE Region transit ASes present in the Internet Routing Table: 1699
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 18
Number of RIPE addresses announced to Internet: 351438208
Equivalent to 20 /8s, 242 /16s and 133 /24s
Percentage of available RIPE address space announced: 80.6
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: 19456
Total LACNIC prefixes after maximum aggregation: 4866
LACNIC Deaggregation factor: 4.00
Prefixes being announced from the LACNIC address blocks: 17825
Unique aggregates announced from the LACNIC address blocks: 9667
LACNIC Region origin ASes present in the Internet Routing Table: 885
LACNIC Prefixes per ASN: 20.14
LACNIC Region origin ASes announcing only one prefix: 279
LACNIC Region transit ASes present in the Internet Routing Table: 152
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 16
Number of LACNIC addresses announced to Internet: 50249728
Equivalent to 2 /8s, 254 /16s and 192 /24s
Percentage of available LACNIC address space announced: 49.9
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: 3611
Total AfriNIC prefixes after maximum aggregation: 1119
AfriNIC Deaggregation factor: 3.23
Prefixes being announced from the AfriNIC address blocks: 4007
Unique aggregates announced from the AfriNIC address blocks: 1805
AfriNIC Region origin ASes present in the Internet Routing Table: 234
AfriNIC Prefixes per ASN: 17.12
AfriNIC Region origin ASes announcing only one prefix: 79
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: 10136064
Equivalent to 0 /8s, 154 /16s and 170 /24s
Percentage of available AfriNIC address space announced: 30.2
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 1624 387 88 Videsh Sanchar Nigam Ltd. Aut
9583 1157 129 191 Sify Limited
9498 1145 550 61 BHARTI BT INTERNET LTD.
17488 1010 68 84 Hathway IP Over Cable Interne
4134 858 12663 320 CHINANET-BACKBONE
4766 851 6005 341 Korea Telecom (KIX)
18101 674 126 53 Reliance Infocom Ltd Internet
9829 595 450 12 BSNL National Internet Backbo
4812 562 969 92 China Telecom (Shanghai)
1221 542 1950 418 Telstra Pty Ltd
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 1438 5945 1020 AT&T WorldNet Services
4323 1405 1028 368 Time Warner Telecom
2386 1386 657 848 AT&T Data Communications Serv
11492 1211 145 48 Cable One
7011 1085 316 619 Citizens Utilities
18566 1044 296 10 Covad Communications
1785 1001 479 107 AppliedTheory Corporation
6197 991 730 478 BellSouth Network Solutions,
174 964 6834 807 Cogent Communications
20115 920 872 510 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
3292 400 1787 364 TDC Tele Danmark
8452 359 188 7 TEDATA
3301 337 1443 306 TeliaNet Sweden
3320 326 7045 270 Deutsche Telekom AG
5462 292 666 26 Telewest Broadband
8866 292 78 24 Bulgarian Telecommunication C
8551 279 267 42 Bezeq International
3215 278 2671 91 France Telecom Transpac
6746 267 127 244 Dynamic Network Technologies,
680 259 2046 258 DFN-IP service G-WiN
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 1192 2449 221 UniNet S.A. de C.V.
11830 555 299 9 Instituto Costarricense de El
22047 553 270 14 VTR PUNTO NET S.A.
7303 453 220 61 Telecom Argentina Stet-France
16814 426 27 10 NSS, S.A.
11172 409 117 70 Servicios Alestra S.A de C.V
6471 401 85 39 ENTEL CHILE S.A.
10620 399 104 51 TVCABLE BOGOTA
14117 350 23 16 Telefonica del Sur S.A.
10481 310 152 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 458 61 27 LINKdotNET AS number
3741 287 853 223 The Internet Solution
20858 217 34 3 EgyNet
2018 200 272 110 Tertiary Education Network
6713 143 135 11 Itissalat Al-MAGHRIB
33783 131 9 16 EEPAD TISP TELECOM & INTERNET
5536 121 8 16 Internet Egypt Network
33776 99 6 7 Starcomms Nigeria Limited
24835 89 48 7 RAYA Telecom - Egypt
2905 83 176 74 The Internetworking Company o
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
6389 2050 3011 98 bellsouth.net, inc.
23577 1634 34 700 Korea Telecom (ATM-MPLS)
4755 1624 387 88 Videsh Sanchar Nigam Ltd. Aut
7018 1438 5945 1020 AT&T WorldNet Services
4323 1405 1028 368 Time Warner Telecom
2386 1386 657 848 AT&T Data Communications Serv
11492 1211 145 48 Cable One
8151 1192 2449 221 UniNet S.A. de C.V.
9583 1157 129 191 Sify Limited
9498 1145 550 61 BHARTI BT INTERNET LTD.
Complete listing at http://thyme.apnic.net/current/data-ASnet
Global Per AS Maximum Aggr summary
----------------------------------
ASN No of nets Net Savings Description
4755 1624 1536 Videsh Sanchar Nigam Ltd. Aut
11492 1211 1163 Cable One
9498 1145 1084 BHARTI BT INTERNET LTD.
4323 1405 1037 Time Warner Telecom
18566 1044 1034 Covad Communications
8151 1192 971 UniNet S.A. de C.V.
9583 1157 966 Sify Limited
17676 1018 952 Softbank BB Corp.
23577 1634 934 Korea Telecom (ATM-MPLS)
17488 1010 926 Hathway IP Over Cable Interne
Complete listing at http://thyme.apnic.net/current/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Network Transit AS Description
14780 UNALLOCATED 4.79.181.0/24 10310 Yahoo!
12180 UNALLOCATED 4.79.248.0/24 1239 Sprint
26478 UNALLOCATED 8.7.228.0/24 6461 AboveNet Communicati
12180 UNALLOCATED 8.10.16.0/24 3549 Global Crossing
12180 UNALLOCATED 8.10.58.0/23 3549 Global Crossing
14779 UNALLOCATED 8.12.144.0/24 10310 Yahoo!
16927 UNALLOCATED 12.0.252.0/23 7018 AT&T WorldNet Servic
22492 UNALLOCATED 12.2.46.0/24 1239 Sprint
15132 UNALLOCATED 12.9.150.0/24 701 UUNET Technologies,
32567 UNALLOCATED 12.14.170.0/24 7018 AT&T WorldNet Servic
Complete listing at http://thyme.apnic.net/current/data-badAS
Advertised Unallocated Addresses
--------------------------------
Network Origin AS Description
24.51.159.0/24 7843 Adelphia Corp.
24.54.224.0/19 20001 HoldCo LLC - Road Runner
24.75.160.0/19 7843 Adelphia Corp.
24.75.192.0/18 7843 Adelphia Corp.
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
63.140.213.0/24 22555 Universal Talkware Corporatio
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 /11:41 /12:137
/13:279 /14:501 /15:1004 /16:9831 /17:4353 /18:7330
/19:15307 /20:17626 /21:16834 /22:21410 /23:22378 /24:132287
/25:792 /26:902 /27:481 /28:108 /29:9 /30:1
/31:0 /32:8
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
11492 1197 1211 Cable One
2386 1087 1386 AT&T Data Communications Serv
18566 1025 1044 Covad Communications
9583 994 1157 Sify Limited
7011 967 1085 Citizens Utilities
4755 964 1624 Videsh Sanchar Nigam Ltd. Aut
6478 898 899 AT&T Worldnet Services
17488 823 1010 Hathway IP Over Cable Interne
9498 817 1145 BHARTI BT INTERNET LTD.
7018 811 1438 AT&T WorldNet Services
Complete listing at http://thyme.apnic.net/current/data/sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
4:9 8:102 12:2000 13:1 15:20 16:3
17:6 18:13 20:35 24:1049 25:1 32:60
33:4 38:409 40:94 41:633 44:2 47:8
52:3 55:3 56:3 57:22 58:517 59:435
60:405 61:984 62:1088 63:1957 64:3391 65:2382
66:3606 67:1126 68:648 69:2128 70:535 71:127
72:1568 73:6 74:921 75:222 76:286 77:625
78:544 79:137 80:890 81:826 82:605 83:367
84:560 85:946 86:396 87:665 88:317 89:1228
90:11 91:1159 92:240 93:234 96:23 97:16
98:112 99:3 112:1 116:586 117:282 118:110
119:370 121:482 122:731 123:313 124:838 125:1109
128:317 129:201 130:125 131:404 132:69 133:9
134:188 135:32 136:221 137:119 138:149 139:65
140:484 141:110 142:380 143:276 144:344 145:50
146:338 147:134 148:499 149:180 150:128 151:172
152:142 153:127 154:11 155:267 156:207 157:261
158:169 159:223 160:244 161:110 162:209 163:195
164:574 165:433 166:298 167:315 168:607 169:131
170:426 171:28 172:3 189:169 190:1667 192:5774
193:4093 194:3256 195:2377 196:1035 198:3769 199:3236
200:5590 201:1383 202:7528 203:7830 204:4012 205:2094
206:2404 207:2722 208:3237 209:3483 210:2527 211:1034
212:1342 213:1660 214:455 215:48 216:4272 217:1233
218:359 219:404 220:1069 221:400 222:313
End of report
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