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.

Sunday, March 17, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 18 Mar, 2013

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

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

BGP routing table entries examined: 446285
Prefixes after maximum aggregation: 183418
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 219082
Total ASes present in the Internet Routing Table: 43588
Prefixes per ASN: 10.24
Origin-only ASes present in the Internet Routing Table: 34339
Origin ASes announcing only one prefix: 16004
Transit ASes present in the Internet Routing Table: 5776
Transit-only ASes present in the Internet Routing Table: 135
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 365
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 4627
Number of 32-bit ASNs visible in the Routing Table: 3473
Prefixes from 32-bit ASNs in the Routing Table: 9763
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 189
Number of addresses announced to Internet: 2623078188
Equivalent to 156 /8s, 88 /16s and 255 /24s
Percentage of available address space announced: 70.9
Percentage of allocated address space announced: 70.9
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: 157628

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

Prefixes being announced by APNIC Region ASes: 107305
Total APNIC prefixes after maximum aggregation: 33216
APNIC Deaggregation factor: 3.23
Prefixes being announced from the APNIC address blocks: 108442
Unique aggregates announced from the APNIC address blocks: 44143
APNIC Region origin ASes present in the Internet Routing Table: 4822
APNIC Prefixes per ASN: 22.49
APNIC Region origin ASes announcing only one prefix: 1234
APNIC Region transit ASes present in the Internet Routing Table: 814
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 463
Number of APNIC addresses announced to Internet: 719340064
Equivalent to 42 /8s, 224 /16s and 66 /24s
Percentage of available APNIC address space announced: 84.1

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: 156776
Total ARIN prefixes after maximum aggregation: 79265
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157454
Unique aggregates announced from the ARIN address blocks: 71638
ARIN Region origin ASes present in the Internet Routing Table: 15547
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5888
ARIN Region transit ASes present in the Internet Routing Table: 1608
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: 1078455424
Equivalent to 64 /8s, 71 /16s and 236 /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: 114255
Total RIPE prefixes after maximum aggregation: 59104
RIPE Deaggregation factor: 1.93
Prefixes being announced from the RIPE address blocks: 117663
Unique aggregates announced from the RIPE address blocks: 75600
RIPE Region origin ASes present in the Internet Routing Table: 17111
RIPE Prefixes per ASN: 6.88
RIPE Region origin ASes announcing only one prefix: 8157
RIPE Region transit ASes present in the Internet Routing Table: 2790
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2237
Number of RIPE addresses announced to Internet: 654499940
Equivalent to 39 /8s, 2 /16s and 224 /24s
Percentage of available RIPE address space announced: 95.1

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: 47337
Total LACNIC prefixes after maximum aggregation: 9350
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 51201
Unique aggregates announced from the LACNIC address blocks: 23801
LACNIC Region origin ASes present in the Internet Routing Table: 1865
LACNIC Prefixes per ASN: 27.45
LACNIC Region origin ASes announcing only one prefix: 545
LACNIC Region transit ASes present in the Internet Routing Table: 346
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 27
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 748
Number of LACNIC addresses announced to Internet: 124771368
Equivalent to 7 /8s, 111 /16s and 220 /24s
Percentage of available LACNIC address space announced: 74.4

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
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: 10722
Total AfriNIC prefixes after maximum aggregation: 2433
AfriNIC Deaggregation factor: 4.41
Prefixes being announced from the AfriNIC address blocks: 11336
Unique aggregates announced from the AfriNIC address blocks: 3728
AfriNIC Region origin ASes present in the Internet Routing Table: 606
AfriNIC Prefixes per ASN: 18.71
AfriNIC Region origin ASes announcing only one prefix: 180
AfriNIC Region transit ASes present in the Internet Routing Table: 131
Average AfriNIC Region AS path length visible: 4.7
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: 45661440
Equivalent to 2 /8s, 184 /16s and 189 /24s
Percentage of available AfriNIC address space announced: 45.4

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 2925 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1832 301 89 TPG Internet Pty Ltd
4755 1721 392 196 TATA Communications formerly
9829 1449 1173 43 BSNL National Internet Backbo
9583 1287 98 535 Sify Limited
7552 1161 1070 12 Vietel Corporation
4808 1116 2054 321 CNCGROUP IP network: China169
9498 1067 310 75 BHARTI Airtel Ltd.
24560 1056 385 161 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 3040 3695 93 bellsouth.net, inc.
7029 2177 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1994 2929 125 Cox Communications, Inc.
1785 1961 677 123 PaeTec Communications, Inc.
20115 1681 1611 623 Charter Communications
4323 1613 1139 401 Time Warner Telecom
30036 1321 292 688 Mediacom Communications Corp
7018 1307 10809 852 AT&T WorldNet Services
11492 1210 222 329 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 1894 544 16 Corbina telecom
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
34984 1105 233 204 BILISIM TELEKOM
12479 840 786 66 Uni2 Autonomous System
13188 838 99 34 Educational Network
20940 792 275 628 Akamai Technologies European
31148 776 40 20 FreeNet ISP
6830 715 2314 436 UPC Distribution Services
8551 715 370 43 Bezeq International
58113 664 73 386 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 2424 1336 89 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7303 1672 1148 208 Telecom Argentina Stet-France
8151 1348 2723 397 UniNet S.A. de C.V.
6503 1230 435 68 AVANTEL, S.A.
14754 943 128 85 Telgua S. A.
18881 829 716 18 Global Village Telecom
27947 790 87 99 Telconet S.A
3816 690 306 85 Empresa Nacional de Telecomun
7738 650 1306 35 Telecomunicacoes da Bahia S.A

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 1286 80 4 MOBITEL
24863 894 274 34 LINKdotNET AS number
6713 535 615 23 Itissalat Al-MAGHRIB
8452 510 958 13 TEDATA
24835 342 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
16637 193 698 88 MTN Network Solutions
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom

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 3040 3695 93 bellsouth.net, inc.
4766 2925 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2424 1336 89 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7029 2177 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1994 2929 125 Cox Communications, Inc.
1785 1961 677 123 PaeTec Communications, Inc.
8402 1894 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
17974 2504 2418 PT TELEKOMUNIKASI INDONESIA
28573 2424 2335 NET Servicos de Comunicao S.A
10620 2354 2122 TVCABLE BOGOTA
4766 2925 2003 Korea Telecom (KIX)
7029 2177 1962 Windstream Communications Inc
18566 2081 1896 Covad Communications
8402 1894 1878 Corbina telecom
22773 1994 1869 Cox Communications, Inc.
1785 1961 1838 PaeTec Communications, Inc.
7545 1832 1743 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
128.0.72.0/21 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
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 mywire Datentechnik GmbH

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
62.12.96.0/19 38478 SunnyVision Limited
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.

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
/13:483 /14:872 /15:1562 /16:12653 /17:6622 /18:10870
/19:21729 /20:31630 /21:33521 /22:46039 /23:41566 /24:234047
/25:1382 /26:1765 /27:859 /28:180 /29:73 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
18566 2031 2081 Covad Communications
6389 1744 3040 bellsouth.net, inc.
8402 1613 1894 Corbina telecom
7029 1569 2177 Windstream Communications Inc
22773 1305 1994 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1204 1321 Mediacom Communications Corp
11492 1172 1210 Cable One
1785 1040 1961 PaeTec Communications, Inc.
7011 950 1198 Citizens Utilities

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

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

1:726 2:796 3:3 4:13 5:704 6:3
8:510 12:1932 13:3 14:755 15:11 16:3
17:8 20:24 23:240 24:1798 27:1460 31:1179
32:44 33:2 34:5 36:27 37:1432 38:861
39:2 40:159 41:2809 42:176 44:4 46:1752
47:2 49:610 50:660 52:12 54:28 55:8
57:28 58:1091 59:578 60:297 61:1385 62:1000
63:2040 64:4291 65:2174 66:4271 67:2051 68:1120
69:3269 70:881 71:520 72:1895 74:2555 75:399
76:289 77:1084 78:1024 79:576 80:1237 81:975
82:639 83:558 84:560 85:1165 86:471 87:949
88:375 89:1767 90:262 91:5434 92:600 93:1713
94:1867 95:1557 96:498 97:336 98:1046 99:41
100:29 101:304 103:2277 105:517 106:131 107:207
108:515 109:1816 110:844 111:1038 112:496 113:765
114:689 115:970 116:878 117:808 118:1003 119:1267
120:378 121:781 122:1734 123:1192 124:1325 125:1312
128:545 129:221 130:323 131:653 132:332 133:143
134:256 135:60 136:221 137:242 138:343 139:178
140:198 141:315 142:532 143:368 144:484 145:89
146:516 147:358 148:709 149:357 150:156 151:468
152:411 153:194 154:32 155:379 156:250 157:392
158:265 159:712 160:332 161:425 162:372 163:206
164:580 165:452 166:391 167:574 168:1017 169:130
170:1022 171:168 172:4 173:1582 174:579 175:435
176:1184 177:1787 178:1792 179:1 180:1382 181:280
182:1201 183:339 184:661 185:294 186:2337 187:1273
188:1906 189:1444 190:6659 192:6406 193:5681 194:4524
195:3471 196:1304 197:892 198:4214 199:5244 200:6028
201:2252 202:8920 203:8724 204:4490 205:2579 206:2784
207:2801 208:4054 209:3539 210:2912 211:1561 212:1999
213:1943 214:909 215:96 216:5189 217:1569 218:605
219:337 220:1263 221:538 222:316 223:487

End of report
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