The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Wednesday, April 10, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 11 Apr, 2013

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

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

BGP routing table entries examined: 449215
Prefixes after maximum aggregation: 184122
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 221638
Total ASes present in the Internet Routing Table: 43792
Prefixes per ASN: 10.26
Origin-only ASes present in the Internet Routing Table: 34439
Origin ASes announcing only one prefix: 16061
Transit ASes present in the Internet Routing Table: 5790
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 377
Unregistered ASNs in the Routing Table: 138
Number of 32-bit ASNs allocated by the RIRs: 4707
Number of 32-bit ASNs visible in the Routing Table: 3563
Prefixes from 32-bit ASNs in the Routing Table: 10106
Special use prefixes present in the Routing Table: 18
Prefixes being announced from unallocated address space: 212
Number of addresses announced to Internet: 2629498220
Equivalent to 156 /8s, 186 /16s and 245 /24s
Percentage of available address space announced: 71.0
Percentage of allocated address space announced: 71.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.4
Total number of prefixes smaller than registry allocations: 158672

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

Prefixes being announced by APNIC Region ASes: 107916
Total APNIC prefixes after maximum aggregation: 33351
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 109145
Unique aggregates announced from the APNIC address blocks: 44360
APNIC Region origin ASes present in the Internet Routing Table: 4818
APNIC Prefixes per ASN: 22.65
APNIC Region origin ASes announcing only one prefix: 1223
APNIC Region transit ASes present in the Internet Routing Table: 821
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 21
Number of APNIC region 32-bit ASNs visible in the Routing Table: 493
Number of APNIC addresses announced to Internet: 720712416
Equivalent to 42 /8s, 245 /16s and 50 /24s
Percentage of available APNIC address space announced: 84.2

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8,
49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8,
106/8, 110/8, 111/8, 112/8, 113/8, 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, 133/8, 150/8, 153/8,
163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
222/8, 223/8,

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

Prefixes being announced by ARIN Region ASes: 157643
Total ARIN prefixes after maximum aggregation: 79582
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 158341
Unique aggregates announced from the ARIN address blocks: 72481
ARIN Region origin ASes present in the Internet Routing Table: 15612
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5937
ARIN Region transit ASes present in the Internet Routing Table: 1609
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 1079396736
Equivalent to 64 /8s, 86 /16s and 73 /24s
Percentage of available ARIN address space announced: 57.1

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, 46080-47103
53248-55295, 393216-394239
ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8,
12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8,
20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8,
29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8,
40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8,
53/8, 54/8, 55/8, 56/8, 57/8, 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, 100/8, 104/8, 107/8, 108/8, 128/8,
129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8,
137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8,
146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8,
157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8,
165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8,
173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8,
205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8,
216/8,

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

Prefixes being announced by RIPE Region ASes: 115693
Total RIPE prefixes after maximum aggregation: 59274
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 119180
Unique aggregates announced from the RIPE address blocks: 76698
RIPE Region origin ASes present in the Internet Routing Table: 17129
RIPE Prefixes per ASN: 6.96
RIPE Region origin ASes announcing only one prefix: 8155
RIPE Region transit ASes present in the Internet Routing Table: 2797
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2288
Number of RIPE addresses announced to Internet: 656335588
Equivalent to 39 /8s, 30 /16s and 226 /24s
Percentage of available RIPE address space announced: 95.4

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, 47104-52223, 56320-58367
59392-61439, 196608-199679
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
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, 109/8,
141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

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

Prefixes being announced by LACNIC Region ASes: 47694
Total LACNIC prefixes after maximum aggregation: 9381
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 51705
Unique aggregates announced from the LACNIC address blocks: 24042
LACNIC Region origin ASes present in the Internet Routing Table: 1889
LACNIC Prefixes per ASN: 27.37
LACNIC Region origin ASes announcing only one prefix: 558
LACNIC Region transit ASes present in the Internet Routing Table: 351
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 757
Number of LACNIC addresses announced to Internet: 126395688
Equivalent to 7 /8s, 136 /16s and 165 /24s
Percentage of available LACNIC address space announced: 75.3

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-62463, 262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
191/8, 200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes: 10021
Total AfriNIC prefixes after maximum aggregation: 2486
AfriNIC Deaggregation factor: 4.03
Prefixes being announced from the AfriNIC address blocks: 10632
Unique aggregates announced from the AfriNIC address blocks: 3860
AfriNIC Region origin ASes present in the Internet Routing Table: 613
AfriNIC Prefixes per ASN: 17.34
AfriNIC Region origin ASes announcing only one prefix: 188
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 46281472
Equivalent to 2 /8s, 194 /16s and 51 /24s
Percentage of available AfriNIC address space announced: 46.0

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8,

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

ASN No of nets /20 equiv MaxAgg Description
4766 2958 11558 924 Korea Telecom (KIX)
17974 2506 840 89 PT TELEKOMUNIKASI INDONESIA
7545 1868 302 95 TPG Internet Pty Ltd
4755 1734 392 198 TATA Communications formerly
9829 1511 1205 40 BSNL National Internet Backbo
9583 1283 98 538 Sify Limited
7552 1137 1066 12 Vietel Corporation
4808 1121 2109 325 CNCGROUP IP network: China169
9498 1069 310 73 BHARTI Airtel Ltd.
24560 1065 385 163 Bharti Airtel Ltd., Telemedia

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3037 3694 87 bellsouth.net, inc.
7029 2174 1265 212 Windstream Communications Inc
18566 2068 382 184 Covad Communications
22773 2011 2929 125 Cox Communications, Inc.
1785 1975 677 123 PaeTec Communications, Inc.
20115 1668 1610 610 Charter Communications
4323 1607 1139 397 Time Warner Telecom
30036 1338 296 656 Mediacom Communications Corp
7018 1318 10808 857 AT&T WorldNet Services
11492 1216 223 331 Cable One

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

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

ASN No of nets /20 equiv MaxAgg Description
8402 1869 544 16 Corbina telecom
34984 1145 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 844 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 822 288 653 Akamai Technologies European
31148 791 41 21 FreeNet ISP
6830 752 2318 442 UPC Distribution Services
8551 734 368 56 Bezeq International
58113 666 74 386 LIR DATACENTER TELECOM SRL

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

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

ASN No of nets /20 equiv MaxAgg Description
28573 2582 1433 98 NET Servicos de Comunicao S.A
10620 2360 409 223 TVCABLE BOGOTA
7303 1674 1153 211 Telecom Argentina Stet-France
8151 1227 2684 398 UniNet S.A. de C.V.
6503 1151 435 68 AVANTEL, S.A.
14754 1138 153 37 Telgua S. A.
18881 850 716 18 Global Village Telecom
27947 807 88 95 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 695 306 85 Empresa Nacional de Telecomun

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

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

ASN No of nets /20 equiv MaxAgg Description
36998 1137 80 4 MOBITEL
24863 686 274 33 LINKdotNET AS number
6713 541 617 25 Itissalat Al-MAGHRIB
8452 355 956 9 TEDATA
24835 277 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 187 698 88 MTN Network Solutions
33776 163 11 15 Starcomms Nigeria Limited

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3037 3694 87 bellsouth.net, inc.
4766 2958 11558 924 Korea Telecom (KIX)
28573 2582 1433 98 NET Servicos de Comunicao S.A
17974 2506 840 89 PT TELEKOMUNIKASI INDONESIA
10620 2360 409 223 TVCABLE BOGOTA
7029 2174 1265 212 Windstream Communications Inc
18566 2068 382 184 Covad Communications
22773 2011 2929 125 Cox Communications, Inc.
1785 1975 677 123 PaeTec Communications, Inc.
8402 1869 544 16 Corbina telecom

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

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

ASN No of nets Net Savings Description
28573 2582 2484 NET Servicos de Comunicao S.A
17974 2506 2417 PT TELEKOMUNIKASI INDONESIA
10620 2360 2137 TVCABLE BOGOTA
4766 2958 2034 Korea Telecom (KIX)
7029 2174 1962 Windstream Communications Inc
22773 2011 1886 Cox Communications, Inc.
18566 2068 1884 Covad Communications
8402 1869 1853 Corbina telecom
1785 1975 1852 PaeTec Communications, Inc.
7545 1868 1773 TPG Internet Pty Ltd

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

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

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
26064 UNALLOCATED 12.149.37.0/24 7018 AT&T WorldNet Servic

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.55.0/24 48571 SC efectRO SRL
128.0.58.0/23 9050 RTD-ROMTELECOM Autonomous Sys
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.96.0/21 12886 LEWTelNet GmbH
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition

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

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

Network Origin AS Description
41.222.80.0/21 37110 Moztel LDA
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.
64.185.230.0/24 27431 JTL Networks Inc.

Complete listing at http://thyme.rand.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 /8:17 /9:13 /10:29 /11:88 /12:248
/13:485 /14:884 /15:1559 /16:12683 /17:6610 /18:10919
/19:21811 /20:31874 /21:33779 /22:46587 /23:41663 /24:235797
/25:1388 /26:1768 /27:862 /28:47 /29:67 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2019 2068 Covad Communications
6389 1742 3037 bellsouth.net, inc.
7029 1613 2174 Windstream Communications Inc
8402 1567 1869 Corbina telecom
22773 1316 2011 Cox Communications, Inc.
30036 1215 1338 Mediacom Communications Corp
11492 1178 1216 Cable One
36998 1131 1137 MOBITEL
1785 1047 1975 PaeTec Communications, Inc.
6983 930 1044 ITC^Deltacom

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

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

1:763 2:796 3:3 4:15 5:850 6:4
8:522 12:1918 13:3 14:771 15:11 16:3
17:9 20:19 23:255 24:1774 27:1446 31:1191
32:42 33:2 34:5 36:41 37:1683 38:861
39:2 40:169 41:2606 42:185 44:6 46:1778
47:2 49:622 50:678 52:12 54:30 55:9
57:27 58:1105 59:587 60:305 61:1448 62:999
63:2036 64:4281 65:2181 66:4278 67:2065 68:1119
69:3249 70:875 71:528 72:1900 74:2562 75:411
76:289 77:1096 78:1046 79:587 80:1229 81:975
82:613 83:576 84:570 85:1154 86:463 87:961
88:526 89:1773 90:281 91:5474 92:615 93:1708
94:1868 95:1577 96:503 97:340 98:1052 99:41
100:29 101:309 103:2388 105:488 106:132 107:207
108:516 109:1827 110:853 111:1047 112:499 113:764
114:687 115:1015 116:879 117:781 118:1017 119:1264
120:386 121:817 122:1726 123:1181 124:1333 125:1327
128:631 129:226 130:332 131:656 132:329 133:148
134:259 135:62 136:221 137:247 138:344 139:184
140:199 141:317 142:542 143:373 144:487 145:93
146:504 147:379 148:697 149:366 150:163 151:528
152:418 153:194 154:44 155:388 156:259 157:392
158:271 159:714 160:337 161:424 162:380 163:202
164:578 165:450 166:334 167:578 168:1023 169:133
170:1024 171:173 172:4 173:1589 174:580 175:445
176:1183 177:1857 178:1782 179:2 180:1386 181:373
182:1131 183:364 184:662 185:339 186:2434 187:1253
188:1990 189:1362 190:6640 192:6494 193:5659 194:4515
195:3479 196:1324 197:811 198:4323 199:5283 200:6023
201:2372 202:8846 203:8763 204:4513 205:2556 206:2803
207:2827 208:4060 209:3550 210:2929 211:1558 212:2016
213:1941 214:935 215:98 216:5196 217:1570 218:620
219:347 220:1270 221:547 222:314 223:445

End of report
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