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.

Monday, March 18, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 19 Mar, 2013

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

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

BGP routing table entries examined: 446352
Prefixes after maximum aggregation: 183287
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 219397
Total ASes present in the Internet Routing Table: 43604
Prefixes per ASN: 10.24
Origin-only ASes present in the Internet Routing Table: 34343
Origin ASes announcing only one prefix: 16010
Transit ASes present in the Internet Routing Table: 5781
Transit-only ASes present in the Internet Routing Table: 133
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: 133
Number of 32-bit ASNs allocated by the RIRs: 4627
Number of 32-bit ASNs visible in the Routing Table: 3480
Prefixes from 32-bit ASNs in the Routing Table: 9757
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 189
Number of addresses announced to Internet: 2623299660
Equivalent to 156 /8s, 92 /16s and 96 /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: 157642

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

Prefixes being announced by APNIC Region ASes: 107344
Total APNIC prefixes after maximum aggregation: 33178
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108502
Unique aggregates announced from the APNIC address blocks: 44157
APNIC Region origin ASes present in the Internet Routing Table: 4818
APNIC Prefixes per ASN: 22.52
APNIC Region origin ASes announcing only one prefix: 1227
APNIC Region transit ASes present in the Internet Routing Table: 819
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 465
Number of APNIC addresses announced to Internet: 719648320
Equivalent to 42 /8s, 228 /16s and 246 /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: 156846
Total ARIN prefixes after maximum aggregation: 79190
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157528
Unique aggregates announced from the ARIN address blocks: 71939
ARIN Region origin ASes present in the Internet Routing Table: 15552
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5891
ARIN Region transit ASes present in the Internet Routing Table: 1611
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: 1078454656
Equivalent to 64 /8s, 71 /16s and 233 /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: 114417
Total RIPE prefixes after maximum aggregation: 59078
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 117800
Unique aggregates announced from the RIPE address blocks: 75570
RIPE Region origin ASes present in the Internet Routing Table: 17118
RIPE Prefixes per ASN: 6.88
RIPE Region origin ASes announcing only one prefix: 8163
RIPE Region transit ASes present in the Internet Routing Table: 2791
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: 2241
Number of RIPE addresses announced to Internet: 654363492
Equivalent to 39 /8s, 0 /16s and 203 /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: 47189
Total LACNIC prefixes after maximum aggregation: 9355
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 51045
Unique aggregates announced from the LACNIC address blocks: 23755
LACNIC Region origin ASes present in the Internet Routing Table: 1866
LACNIC Prefixes per ASN: 27.36
LACNIC Region origin ASes announcing only one prefix: 547
LACNIC Region transit ASes present in the Internet Routing Table: 347
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 749
Number of LACNIC addresses announced to Internet: 124828456
Equivalent to 7 /8s, 112 /16s and 187 /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: 10672
Total AfriNIC prefixes after maximum aggregation: 2436
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 11288
Unique aggregates announced from the AfriNIC address blocks: 3804
AfriNIC Region origin ASes present in the Internet Routing Table: 608
AfriNIC Prefixes per ASN: 18.57
AfriNIC Region origin ASes announcing only one prefix: 182
AfriNIC Region transit ASes present in the Internet Routing Table: 128
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: 45654784
Equivalent to 2 /8s, 184 /16s and 163 /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 2946 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1833 301 89 TPG Internet Pty Ltd
4755 1721 392 196 TATA Communications formerly
9829 1465 1173 43 BSNL National Internet Backbo
9583 1286 98 532 Sify Limited
7552 1161 1070 12 Vietel Corporation
4808 1117 2056 321 CNCGROUP IP network: China169
9498 1067 310 75 BHARTI Airtel Ltd.
24560 1060 385 165 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 3038 3695 93 bellsouth.net, inc.
7029 2176 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1994 2929 125 Cox Communications, Inc.
1785 1962 677 123 PaeTec Communications, Inc.
20115 1681 1611 623 Charter Communications
4323 1613 1139 401 Time Warner Telecom
30036 1334 293 690 Mediacom Communications Corp
7018 1305 10809 851 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 1930 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 795 276 631 Akamai Technologies European
31148 776 40 20 FreeNet ISP
8551 718 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
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 2422 1336 89 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7303 1672 1148 208 Telecom Argentina Stet-France
8151 1346 2723 396 UniNet S.A. de C.V.
6503 1230 435 68 AVANTEL, S.A.
14754 941 127 87 Telgua S. A.
18881 830 716 18 Global Village Telecom
27947 791 87 100 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 893 274 34 LINKdotNET AS number
6713 535 615 23 Itissalat Al-MAGHRIB
8452 512 958 13 TEDATA
24835 342 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 190 698 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
6389 3038 3695 93 bellsouth.net, inc.
4766 2946 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2422 1336 89 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7029 2176 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1994 2929 125 Cox Communications, Inc.
1785 1962 677 123 PaeTec Communications, Inc.
8402 1930 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 2422 2333 NET Servicos de Comunicao S.A
10620 2354 2122 TVCABLE BOGOTA
4766 2946 2024 Korea Telecom (KIX)
7029 2176 1961 Windstream Communications Inc
8402 1930 1914 Corbina telecom
18566 2081 1896 Covad Communications
22773 1994 1869 Cox Communications, Inc.
1785 1962 1839 PaeTec Communications, Inc.
7545 1833 1744 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 /12:247
/13:483 /14:871 /15:1562 /16:12650 /17:6611 /18:10871
/19:21718 /20:31622 /21:33528 /22:46098 /23:41584 /24:234058
/25:1382 /26:1770 /27:860 /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 1742 3038 bellsouth.net, inc.
8402 1650 1930 Corbina telecom
7029 1568 2176 Windstream Communications Inc
22773 1305 1994 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1217 1334 Mediacom Communications Corp
11492 1172 1210 Cable One
1785 1041 1962 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)
----------------------------------------------

1:724 2:796 3:3 4:13 5:702 6:3
8:511 12:1934 13:3 14:758 15:11 16:2
17:8 20:24 23:241 24:1799 27:1460 31:1180
32:44 33:2 34:5 36:27 37:1432 38:861
39:2 40:159 41:2767 42:176 44:6 46:1747
47:2 49:610 50:664 52:12 54:28 55:7
57:28 58:1090 59:581 60:303 61:1395 62:1001
63:2040 64:4292 65:2178 66:4272 67:2051 68:1120
69:3268 70:881 71:520 72:1895 74:2554 75:399
76:289 77:1085 78:1042 79:576 80:1237 81:975
82:640 83:558 84:560 85:1155 86:468 87:939
88:375 89:1732 90:262 91:5439 92:602 93:1713
94:1871 95:1596 96:498 97:336 98:1046 99:41
100:29 101:308 103:2295 105:519 106:131 107:207
108:516 109:1810 110:851 111:1037 112:496 113:766
114:684 115:963 116:881 117:807 118:998 119:1269
120:378 121:777 122:1732 123:1191 124:1323 125:1314
128:547 129:221 130:322 131:653 132:332 133:143
134:256 135:60 136:221 137:243 138:342 139:178
140:199 141:315 142:531 143:372 144:490 145:89
146:522 147:357 148:702 149:358 150:156 151:469
152:411 153:194 154:32 155:380 156:250 157:393
158:265 159:712 160:335 161:425 162:373 163:206
164:580 165:452 166:391 167:574 168:1017 169:130
170:1023 171:168 172:4 173:1589 174:575 175:435
176:1184 177:1726 178:1788 180:1382 181:283 182:1207
183:336 184:661 185:302 186:2347 187:1266 188:1930
189:1440 190:6621 192:6406 193:5681 194:4525 195:3472
196:1304 197:891 198:4216 199:5261 200:6027 201:2245
202:8905 203:8728 204:4490 205:2554 206:2792 207:2824
208:4058 209:3536 210:2914 211:1563 212:2001 213:1970
214:909 215:96 216:5186 217:1570 218:606 219:337
220:1267 221:547 222:315 223:489

End of report
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