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.

Thursday, January 3, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 04 Jan, 2013

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

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

BGP routing table entries examined: 438365
Prefixes after maximum aggregation: 181100
Deaggregation factor: 2.42
Unique aggregates announced to Internet: 215478
Total ASes present in the Internet Routing Table: 42976
Prefixes per ASN: 10.20
Origin-only ASes present in the Internet Routing Table: 34009
Origin ASes announcing only one prefix: 15919
Transit ASes present in the Internet Routing Table: 5707
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 31
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 371
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 3615
Number of 32-bit ASNs visible in the Routing Table: 3260
Prefixes from 32-bit ASNs in the Routing Table: 8838
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 174
Number of addresses announced to Internet: 2620980588
Equivalent to 156 /8s, 56 /16s and 253 /24s
Percentage of available address space announced: 70.8
Percentage of allocated address space announced: 70.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.1
Total number of prefixes smaller than registry allocations: 154916

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

Prefixes being announced by APNIC Region ASes: 105439
Total APNIC prefixes after maximum aggregation: 32824
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 106387
Unique aggregates announced from the APNIC address blocks: 43517
APNIC Region origin ASes present in the Internet Routing Table: 4812
APNIC Prefixes per ASN: 22.11
APNIC Region origin ASes announcing only one prefix: 1247
APNIC Region transit ASes present in the Internet Routing Table: 802
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: 401
Number of APNIC addresses announced to Internet: 716688992
Equivalent to 42 /8s, 183 /16s and 206 /24s
Percentage of available APNIC address space announced: 83.8

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: 156099
Total ARIN prefixes after maximum aggregation: 78464
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 156784
Unique aggregates announced from the ARIN address blocks: 70756
ARIN Region origin ASes present in the Internet Routing Table: 15363
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5812
ARIN Region transit ASes present in the Internet Routing Table: 1585
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 25
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1090250880
Equivalent to 64 /8s, 251 /16s and 232 /24s
Percentage of available ARIN address space announced: 57.7

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: 112826
Total RIPE prefixes after maximum aggregation: 58373
RIPE Deaggregation factor: 1.93
Prefixes being announced from the RIPE address blocks: 115796
Unique aggregates announced from the RIPE address blocks: 74288
RIPE Region origin ASes present in the Internet Routing Table: 17013
RIPE Prefixes per ASN: 6.81
RIPE Region origin ASes announcing only one prefix: 8164
RIPE Region transit ASes present in the Internet Routing Table: 2763
Average RIPE Region AS path length visible: 4.9
Max RIPE Region AS path length visible: 31
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2102
Number of RIPE addresses announced to Internet: 649886052
Equivalent to 38 /8s, 188 /16s and 121 /24s
Percentage of available RIPE address space announced: 94.5

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: 45422
Total LACNIC prefixes after maximum aggregation: 9037
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 49040
Unique aggregates announced from the LACNIC address blocks: 23159
LACNIC Region origin ASes present in the Internet Routing Table: 1769
LACNIC Prefixes per ASN: 27.72
LACNIC Region origin ASes announcing only one prefix: 504
LACNIC Region transit ASes present in the Internet Routing Table: 336
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 734
Number of LACNIC addresses announced to Internet: 120968232
Equivalent to 7 /8s, 53 /16s and 212 /24s
Percentage of available LACNIC address space announced: 72.1

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: 9621
Total AfriNIC prefixes after maximum aggregation: 2349
AfriNIC Deaggregation factor: 4.10
Prefixes being announced from the AfriNIC address blocks: 10184
Unique aggregates announced from the AfriNIC address blocks: 3603
AfriNIC Region origin ASes present in the Internet Routing Table: 588
AfriNIC Prefixes per ASN: 17.32
AfriNIC Region origin ASes announcing only one prefix: 192
AfriNIC Region transit ASes present in the Internet Routing Table: 129
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: 6
Number of AfriNIC addresses announced to Internet: 42884352
Equivalent to 2 /8s, 142 /16s and 93 /24s
Percentage of available AfriNIC address space announced: 42.6

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 2939 11556 914 Korea Telecom (KIX)
17974 2483 829 54 PT TELEKOMUNIKASI INDONESIA
7545 1815 301 88 TPG Internet Pty Ltd
4755 1664 381 175 TATA Communications formerly
9829 1417 1156 42 BSNL National Internet Backbo
9583 1198 89 501 Sify Limited
7552 1144 1070 12 Vietel Corporation
4808 1124 2040 316 CNCGROUP IP network: China169
9498 1052 309 74 BHARTI Airtel Ltd.
24560 1038 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
7029 3458 1266 216 Windstream Communications Inc
6389 3117 3701 131 bellsouth.net, inc.
18566 2081 382 180 Covad Communications
22773 1952 2932 131 Cox Communications, Inc.
1785 1942 678 124 PaeTec Communications, Inc.
20115 1688 1603 618 Charter Communications
4323 1597 1155 397 Time Warner Telecom
30036 1363 288 702 Mediacom Communications Corp
7018 1292 10549 852 AT&T WorldNet Services
7011 1206 321 685 Citizens Utilities

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 1729 544 16 Corbina telecom
2118 1052 97 15 EUnet/RELCOM Autonomous Syste
34984 904 211 232 BILISIM TELEKOM
12479 869 777 64 Uni2 Autonomous System
13188 769 96 117 Educational Network
31148 743 38 15 FreeNet ISP
20940 735 242 573 Akamai Technologies European
6830 714 2313 435 UPC Distribution Services
8551 653 367 39 Bezeq International
58113 633 70 378 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
10620 2270 387 207 TVCABLE BOGOTA
28573 2249 1299 70 NET Servicos de Comunicao S.A
7303 1674 1139 202 Telecom Argentina Stet-France
8151 1542 2912 356 UniNet S.A. de C.V.
6503 1454 435 67 AVANTEL, S.A.
27947 768 85 93 Telconet S.A
18881 747 716 18 Global Village Telecom
3816 672 309 71 Empresa Nacional de Telecomun
11172 602 86 66 Servicios Alestra S.A de C.V
7738 587 1242 34 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
24863 878 275 36 LINKdotNET AS number
36998 749 48 3 MOBITEL
8452 517 958 13 TEDATA
6713 499 602 20 Itissalat Al-MAGHRIB
24835 291 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 181 697 88 MTN Network Solutions

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
7029 3458 1266 216 Windstream Communications Inc
6389 3117 3701 131 bellsouth.net, inc.
4766 2939 11556 914 Korea Telecom (KIX)
17974 2483 829 54 PT TELEKOMUNIKASI INDONESIA
10620 2270 387 207 TVCABLE BOGOTA
28573 2249 1299 70 NET Servicos de Comunicao S.A
18566 2081 382 180 Covad Communications
22773 1952 2932 131 Cox Communications, Inc.
1785 1942 678 124 PaeTec Communications, Inc.
7545 1815 301 88 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
6389 3117 2986 bellsouth.net, inc.
17974 2483 2429 PT TELEKOMUNIKASI INDONESIA
28573 2249 2179 NET Servicos de Comunicao S.A
10620 2270 2063 TVCABLE BOGOTA
4766 2939 2025 Korea Telecom (KIX)
18566 2081 1901 Covad Communications
22773 1952 1821 Cox Communications, Inc.
1785 1942 1818 PaeTec Communications, Inc.
7545 1815 1727 TPG Internet Pty Ltd
8402 1729 1713 Corbina telecom

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
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
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
27.112.114.0/24 23884 Proimage Engineering and Comm
31.210.16.0/22 15657 Neural Networks ASN
41.222.80.0/21 37110 Moztel LDA
41.223.108.0/22 36966 >>UNKNOWN<<
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
64.66.32.0/20 18864 >>UNKNOWN<<
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 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 /8:18 /9:13 /10:29 /11:87 /12:245
/13:478 /14:857 /15:1541 /16:12478 /17:6556 /18:10931
/19:21616 /20:31048 /21:33041 /22:44252 /23:40853 /24:230164
/25:1301 /26:1687 /27:875 /28:177 /29:80 /30:17
/31:0 /32:21

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

ASN No of nets Total ann. Description
7029 2724 3458 Windstream Communications Inc
18566 2031 2081 Covad Communications
6389 1773 3117 bellsouth.net, inc.
8402 1452 1729 Corbina telecom
22773 1283 1952 Cox Communications, Inc.
30036 1264 1363 Mediacom Communications Corp
11492 1157 1194 Cable One
1785 1024 1942 PaeTec Communications, Inc.
6503 980 1454 AVANTEL, S.A.
7011 954 1206 Citizens Utilities

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

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

1:683 2:702 3:3 4:13 5:700 6:3
8:470 12:1938 13:3 14:700 15:11 16:3
17:6 20:27 23:221 24:1793 27:1471 31:1351
32:54 33:2 34:2 36:10 37:1152 38:841
39:2 40:139 41:2569 42:180 44:3 46:1692
47:3 49:531 50:658 52:12 54:28 55:9
57:28 58:1073 59:562 60:237 61:1316 62:1033
63:2010 64:4351 65:2199 66:4507 67:2088 68:1190
69:3333 70:938 71:551 72:1888 74:2614 75:473
76:295 77:1050 78:1032 79:541 80:1215 81:982
82:661 83:532 84:529 85:1165 86:464 87:971
88:363 89:1741 90:304 91:5379 92:612 93:1622
94:1981 95:1615 96:489 97:337 98:964 99:46
100:32 101:290 103:1972 105:501 106:125 107:204
108:510 109:1745 110:833 111:988 112:470 113:743
114:682 115:907 116:902 117:771 118:966 119:1270
120:373 121:707 122:1725 123:1172 124:1317 125:1301
128:813 129:201 130:308 131:641 132:319 133:142
134:254 135:62 136:209 137:236 138:342 139:169
140:182 141:299 142:514 143:355 144:490 145:89
146:519 147:327 148:731 149:336 150:158 151:249
152:399 153:188 154:23 155:443 156:231 157:378
158:257 159:679 160:335 161:421 162:370 163:192
164:581 165:459 166:464 167:569 168:1007 169:130
170:1000 171:164 172:4 173:1630 174:769 175:466
176:950 177:1521 178:1708 180:1357 181:189 182:1149
183:293 184:654 185:152 186:2178 187:1463 188:1913
189:1568 190:6193 192:6092 193:5717 194:4494 195:3608
196:1233 197:286 198:4042 199:5160 200:6029 201:2036
202:8776 203:8754 204:4474 205:2540 206:2803 207:2795
208:4062 209:3655 210:2901 211:1560 212:1998 213:1884
214:863 215:91 216:5138 217:1565 218:596 219:323
220:1260 221:544 222:324 223:397

End of report
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