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, January 27, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 28 Jan, 2013

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

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

BGP routing table entries examined: 440526
Prefixes after maximum aggregation: 181547
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 216394
Total ASes present in the Internet Routing Table: 43134
Prefixes per ASN: 10.21
Origin-only ASes present in the Internet Routing Table: 34061
Origin ASes announcing only one prefix: 15895
Transit ASes present in the Internet Routing Table: 5748
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 32
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 384
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 3708
Number of 32-bit ASNs visible in the Routing Table: 3325
Prefixes from 32-bit ASNs in the Routing Table: 9123
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 188
Number of addresses announced to Internet: 2629676300
Equivalent to 156 /8s, 189 /16s and 173 /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: 94.2
Total number of prefixes smaller than registry allocations: 155512

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

Prefixes being announced by APNIC Region ASes: 105875
Total APNIC prefixes after maximum aggregation: 32990
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 106908
Unique aggregates announced from the APNIC address blocks: 43758
APNIC Region origin ASes present in the Internet Routing Table: 4814
APNIC Prefixes per ASN: 22.21
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 812
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: 419
Number of APNIC addresses announced to Internet: 717477120
Equivalent to 42 /8s, 195 /16s and 213 /24s
Percentage of available APNIC address space announced: 83.9

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: 155285
Total ARIN prefixes after maximum aggregation: 78564
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155923
Unique aggregates announced from the ARIN address blocks: 70750
ARIN Region origin ASes present in the Internet Routing Table: 15416
ARIN Prefixes per ASN: 10.11
ARIN Region origin ASes announcing only one prefix: 5815
ARIN Region transit ASes present in the Internet Routing Table: 1597
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: 1091922560
Equivalent to 65 /8s, 21 /16s and 106 /24s
Percentage of available ARIN address space announced: 57.8

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: 113354
Total RIPE prefixes after maximum aggregation: 58454
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 116439
Unique aggregates announced from the RIPE address blocks: 74488
RIPE Region origin ASes present in the Internet Routing Table: 17039
RIPE Prefixes per ASN: 6.83
RIPE Region origin ASes announcing only one prefix: 8153
RIPE Region transit ASes present in the Internet Routing Table: 2779
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2145
Number of RIPE addresses announced to Internet: 653193828
Equivalent to 38 /8s, 238 /16s and 242 /24s
Percentage of available RIPE address space announced: 95.0

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: 46305
Total LACNIC prefixes after maximum aggregation: 9085
LACNIC Deaggregation factor: 5.10
Prefixes being announced from the LACNIC address blocks: 50031
Unique aggregates announced from the LACNIC address blocks: 23532
LACNIC Region origin ASes present in the Internet Routing Table: 1785
LACNIC Prefixes per ASN: 28.03
LACNIC Region origin ASes announcing only one prefix: 509
LACNIC Region transit ASes present in the Internet Routing Table: 337
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 27
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 737
Number of LACNIC addresses announced to Internet: 122477864
Equivalent to 7 /8s, 76 /16s and 221 /24s
Percentage of available LACNIC address space announced: 73.0

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: 10450
Total AfriNIC prefixes after maximum aggregation: 2402
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 11037
Unique aggregates announced from the AfriNIC address blocks: 3699
AfriNIC Region origin ASes present in the Internet Routing Table: 586
AfriNIC Prefixes per ASN: 18.83
AfriNIC Region origin ASes announcing only one prefix: 179
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: 17
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 44254464
Equivalent to 2 /8s, 163 /16s and 69 /24s
Percentage of available AfriNIC address space announced: 44.0

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 2937 11556 920 Korea Telecom (KIX)
17974 2474 829 53 PT TELEKOMUNIKASI INDONESIA
7545 1821 301 85 TPG Internet Pty Ltd
4755 1670 380 175 TATA Communications formerly
9829 1396 1152 45 BSNL National Internet Backbo
9583 1204 89 502 Sify Limited
7552 1140 1070 12 Vietel Corporation
4808 1124 2040 316 CNCGROUP IP network: China169
9498 1052 310 75 BHARTI Airtel Ltd.
24560 1040 385 160 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 3098 3700 118 bellsouth.net, inc.
7029 2285 1265 211 Windstream Communications Inc
18566 2081 382 180 Covad Communications
22773 1961 2931 128 Cox Communications, Inc.
1785 1949 678 124 PaeTec Communications, Inc.
20115 1689 1607 628 Charter Communications
4323 1598 1155 394 Time Warner Telecom
30036 1356 289 692 Mediacom Communications Corp
7018 1302 10550 861 AT&T WorldNet Services
7011 1207 319 687 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 1867 544 16 Corbina telecom
2118 1432 97 13 EUnet/RELCOM Autonomous Syste
34984 933 231 205 BILISIM TELEKOM
13188 841 99 22 Educational Network
12479 833 778 65 Uni2 Autonomous System
31148 747 38 16 FreeNet ISP
20940 733 247 582 Akamai Technologies European
8551 714 367 39 Bezeq International
6830 713 2313 434 UPC Distribution Services
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
28573 2328 1315 81 NET Servicos de Comunicao S.A
10620 2301 394 224 TVCABLE BOGOTA
7303 1677 1147 204 Telecom Argentina Stet-France
8151 1533 2893 377 UniNet S.A. de C.V.
6503 1469 435 67 AVANTEL, S.A.
14754 793 112 126 Telgua S. A.
27947 771 85 93 Telconet S.A
18881 756 716 18 Global Village Telecom
3816 674 306 85 Empresa Nacional de Telecomun
11172 603 86 67 Servicios Alestra S.A de C.V

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 896 275 36 LINKdotNET AS number
8452 557 958 13 TEDATA
6713 499 602 20 Itissalat Al-MAGHRIB
24835 329 80 8 RAYA Telecom - Egypt
3741 266 906 224 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 190 696 90 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
6389 3098 3700 118 bellsouth.net, inc.
4766 2937 11556 920 Korea Telecom (KIX)
17974 2474 829 53 PT TELEKOMUNIKASI INDONESIA
28573 2328 1315 81 NET Servicos de Comunicao S.A
10620 2301 394 224 TVCABLE BOGOTA
7029 2285 1265 211 Windstream Communications Inc
18566 2081 382 180 Covad Communications
22773 1961 2931 128 Cox Communications, Inc.
1785 1949 678 124 PaeTec Communications, Inc.
8402 1867 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 2474 2421 PT TELEKOMUNIKASI INDONESIA
28573 2328 2247 NET Servicos de Comunicao S.A
10620 2301 2077 TVCABLE BOGOTA
7029 2285 2074 Windstream Communications Inc
4766 2937 2017 Korea Telecom (KIX)
18566 2081 1901 Covad Communications
8402 1867 1851 Corbina telecom
22773 1961 1833 Cox Communications, Inc.
1785 1949 1825 PaeTec Communications, Inc.
7545 1821 1736 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
128.0.24.0/21 41794 Altline LLC
128.0.60.0/23 57417 INTERNET TASMANIA SRL
128.0.62.0/23 57417 INTERNET TASMANIA SRL
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

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
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.

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 /11:88 /12:246
/13:479 /14:866 /15:1555 /16:12534 /17:6595 /18:10928
/19:21701 /20:31085 /21:33225 /22:44915 /23:40766 /24:231260
/25:1351 /26:1723 /27:861 /28:179 /29:74 /30:14
/31:0 /32:21

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

ASN No of nets Total ann. Description
18566 2031 2081 Covad Communications
6389 1770 3098 bellsouth.net, inc.
7029 1642 2285 Windstream Communications Inc
8402 1592 1867 Corbina telecom
22773 1292 1961 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1250 1356 Mediacom Communications Corp
11492 1158 1195 Cable One
1785 1030 1949 PaeTec Communications, Inc.
6503 983 1469 AVANTEL, S.A.

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

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

1:712 2:761 3:3 4:13 5:726 6:3
8:489 12:1932 13:3 14:712 15:11 16:3
17:8 20:27 23:221 24:1803 27:1483 31:1124
32:54 33:2 34:5 36:9 37:1212 38:847
39:2 40:139 41:2696 42:180 44:4 46:1737
47:1 49:539 50:667 52:12 54:28 55:3
57:28 58:1075 59:560 60:249 61:1314 62:1034
63:2041 64:4338 65:2162 66:4267 67:2021 68:1119
69:3236 70:858 71:536 72:1878 74:2545 75:423
76:294 77:1063 78:1034 79:552 80:1225 81:983
82:652 83:535 84:575 85:1163 86:472 87:971
88:365 89:1744 90:285 91:5387 92:607 93:1656
94:2013 95:1589 96:484 97:331 98:1052 99:52
100:30 101:304 103:2045 105:531 106:129 107:208
108:503 109:1745 110:844 111:1001 112:473 113:747
114:679 115:924 116:885 117:784 118:971 119:1285
120:328 121:700 122:1723 123:1176 124:1323 125:1299
128:551 129:202 130:311 131:648 132:327 133:142
134:255 135:62 136:219 137:235 138:340 139:156
140:216 141:313 142:514 143:367 144:474 145:90
146:527 147:331 148:726 149:341 150:159 151:287
152:398 153:190 154:24 155:366 156:239 157:348
158:257 159:706 160:334 161:420 162:367 163:202
164:579 165:459 166:459 167:573 168:1005 169:131
170:1008 171:163 172:4 173:1555 174:625 175:426
176:1039 177:1614 178:1688 180:1375 181:216 182:1164
183:314 184:636 185:185 186:2260 187:1465 188:1900
189:1544 190:6542 192:6189 193:5839 194:4671 195:3663
196:1281 197:827 198:4084 199:5174 200:6009 201:2174
202:8805 203:8759 204:4459 205:2533 206:2799 207:2790
208:4065 209:3525 210:2905 211:1558 212:2002 213:1882
214:921 215:91 216:5062 217:1581 218:594 219:326
220:1267 221:527 222:337 223:412

End of report
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