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, December 15, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 16 Dec, 2013

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

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

BGP routing table entries examined: 475102
Prefixes after maximum aggregation: 190093
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 235950
Total ASes present in the Internet Routing Table: 45717
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35475
Origin ASes announcing only one prefix: 16267
Transit ASes present in the Internet Routing Table: 5946
Transit-only ASes present in the Internet Routing Table: 174
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 53
Max AS path prepend of ASN ( 50404) 51
Prefixes from unregistered ASNs in the Routing Table: 1053
Unregistered ASNs in the Routing Table: 294
Number of 32-bit ASNs allocated by the RIRs: 5519
Number of 32-bit ASNs visible in the Routing Table: 4296
Prefixes from 32-bit ASNs in the Routing Table: 13534
Number of bogon 32-bit ASNs visible in the Routing Table: 1
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 1418
Number of addresses announced to Internet: 2659633564
Equivalent to 158 /8s, 134 /16s and 201 /24s
Percentage of available address space announced: 71.8
Percentage of allocated address space announced: 71.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.3
Total number of prefixes smaller than registry allocations: 165555

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

Prefixes being announced by APNIC Region ASes: 113005
Total APNIC prefixes after maximum aggregation: 34170
APNIC Deaggregation factor: 3.31
Prefixes being announced from the APNIC address blocks: 115284
Unique aggregates announced from the APNIC address blocks: 48113
APNIC Region origin ASes present in the Internet Routing Table: 4873
APNIC Prefixes per ASN: 23.66
APNIC Region origin ASes announcing only one prefix: 1208
APNIC Region transit ASes present in the Internet Routing Table: 834
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 38
Number of APNIC region 32-bit ASNs visible in the Routing Table: 788
Number of APNIC addresses announced to Internet: 729313216
Equivalent to 43 /8s, 120 /16s and 111 /24s
Percentage of available APNIC address space announced: 85.2

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-63999, 131072-133631
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: 163319
Total ARIN prefixes after maximum aggregation: 81784
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 164102
Unique aggregates announced from the ARIN address blocks: 75750
ARIN Region origin ASes present in the Internet Routing Table: 15931
ARIN Prefixes per ASN: 10.30
ARIN Region origin ASes announcing only one prefix: 5997
ARIN Region transit ASes present in the Internet Routing Table: 1668
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 45
Number of ARIN addresses announced to Internet: 1074677376
Equivalent to 64 /8s, 14 /16s and 70 /24s
Percentage of available ARIN address space announced: 56.9

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, 62464-63487, 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: 119529
Total RIPE prefixes after maximum aggregation: 61277
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123330
Unique aggregates announced from the RIPE address blocks: 79293
RIPE Region origin ASes present in the Internet Routing Table: 17562
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8301
RIPE Region transit ASes present in the Internet Routing Table: 2818
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 53
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2529
Number of RIPE addresses announced to Internet: 655876580
Equivalent to 39 /8s, 23 /16s and 225 /24s
Percentage of available RIPE address space announced: 95.3

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, 61952-62463, 196608-200191
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: 53205
Total LACNIC prefixes after maximum aggregation: 10026
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58563
Unique aggregates announced from the LACNIC address blocks: 27460
LACNIC Region origin ASes present in the Internet Routing Table: 2051
LACNIC Prefixes per ASN: 28.55
LACNIC Region origin ASes announcing only one prefix: 551
LACNIC Region transit ASes present in the Internet Routing Table: 396
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 35
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 926
Number of LACNIC addresses announced to Internet: 146563640
Equivalent to 8 /8s, 188 /16s and 98 /24s
Percentage of available LACNIC address space announced: 87.4

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 11758
Total AfriNIC prefixes after maximum aggregation: 2598
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12405
Unique aggregates announced from the AfriNIC address blocks: 4220
AfriNIC Region origin ASes present in the Internet Routing Table: 695
AfriNIC Prefixes per ASN: 17.85
AfriNIC Region origin ASes announcing only one prefix: 210
AfriNIC Region transit ASes present in the Internet Routing Table: 146
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 8
Number of AfriNIC addresses announced to Internet: 48631616
Equivalent to 2 /8s, 230 /16s and 15 /24s
Percentage of available AfriNIC address space announced: 48.3

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 2948 11558 951 Korea Telecom (KIX)
17974 2730 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2120 319 111 TPG Internet Pty Ltd
4755 1799 392 190 TATA Communications formerly
9829 1556 1251 42 BSNL National Internet Backbo
9583 1323 102 544 Sify Limited
9498 1228 309 72 BHARTI Airtel Ltd.
7552 1140 1080 13 Vietel Corporation
4808 1138 2118 339 CNCGROUP IP network: China169
24560 1097 382 167 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 3032 3688 53 BellSouth.net Inc.
22773 2299 2939 138 Cox Communications, Inc.
1785 2147 686 131 PaeTec Communications, Inc.
18566 2051 379 178 MegaPath Corporation
20115 1681 1659 599 Charter Communications
4323 1635 1082 416 Time Warner Telecom
701 1508 11144 779 MCI Communications Services,
30036 1378 309 577 Mediacom Communications Corp
7018 1310 17746 855 AT&T WorldNet Services
6983 1292 755 578 ITC^Deltacom

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 1971 544 16 OJSC "Vimpelcom"
34984 1366 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1211 458 911 Akamai Technologies European
31148 1011 45 19 FreeNet ISP
13188 897 99 42 TOV "Bank-Inform"
6849 860 363 39 JSC UKRTELECOM,
8551 793 370 41 Bezeq International
6830 772 2327 425 UPC Distribution Services
12479 684 798 53 Uni2 Autonomous System
35228 551 246 16 Avatar Broadband Limited

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 3415 1829 94 NET Servicos de Comunicao S.A
10620 2695 436 199 Telmex Colombia S.A.
7303 1738 1161 233 Telecom Argentina Stet-France
18881 1721 908 20 Global Village Telecom
8151 1368 2857 424 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 855 93 89 Telconet S.A
6503 791 434 61 AVANTEL, S.A.
6147 790 373 27 Telefonica Del Peru
7738 780 1498 36 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 1819 112 5 Sudanese Mobile Telephone (ZA
24863 872 338 26 LINKdotNET AS number
6713 598 653 27 Itissalat Al-MAGHRIB
8452 420 956 9 TEDATA
24835 298 144 9 RAYA Telecom - Egypt
3741 247 921 209 The Internet Solution
36992 246 525 29 Etisalat MISR
29571 233 21 14 Ci Telecom Autonomous system
15706 219 32 6 Sudatel Internet Exchange Aut
29975 192 668 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
28573 3415 1829 94 NET Servicos de Comunicao S.A
6389 3032 3688 53 BellSouth.net Inc.
4766 2948 11558 951 Korea Telecom (KIX)
17974 2730 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2695 436 199 Telmex Colombia S.A.
22773 2299 2939 138 Cox Communications, Inc.
1785 2147 686 131 PaeTec Communications, Inc.
7545 2120 319 111 TPG Internet Pty Ltd
18566 2051 379 178 MegaPath Corporation
8402 1971 544 16 OJSC "Vimpelcom"

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 3032 2979 BellSouth.net Inc.
17974 2730 2642 PT TELEKOMUNIKASI INDONESIA
10620 2695 2496 Telmex Colombia S.A.
22773 2299 2161 Cox Communications, Inc.
1785 2147 2016 PaeTec Communications, Inc.
7545 2120 2009 TPG Internet Pty Ltd
4766 2948 1997 Korea Telecom (KIX)
8402 1971 1955 OJSC "Vimpelcom"
18566 2051 1873 MegaPath Corporation
36998 1819 1814 Sudanese Mobile Telephone (ZA

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

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

Bad AS Designation Network Transit AS Description
62828 UNALLOCATED 8.21.130.0/24 4323 Time Warner Telecom
62850 UNALLOCATED 8.25.147.0/24 46887 Lightower Fiber Netw
62734 UNALLOCATED 8.31.128.0/24 6939 Hurricane Electric
62773 UNALLOCATED 8.35.180.0/22 3356 Level 3 Communicatio
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
62861 UNALLOCATED 12.37.197.0/24 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 Communications
17300 UNALLOCATED 12.45.110.0/24 701 MCI Communications S

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
23.91.0.0/19 40676 Psychz Networks
23.91.4.0/24 40676 Psychz Networks
23.91.14.0/24 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.80.0/20 21560 Capital Technology Services G
23.91.96.0/20 37958 ChinaCache Networks ASN
23.91.112.0/21 32475 MidPhase Inc.
23.91.120.0/21 36351 SoftLayer Technologies Inc.
23.91.160.0/22 36493 3757277 Canada Inc. (oa 295.c

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 /8:16 /9:11 /10:31 /11:92 /12:253
/13:474 /14:936 /15:1636 /16:12848 /17:6764 /18:11346
/19:23164 /20:33036 /21:35775 /22:50387 /23:43948 /24:251955
/25:832 /26:986 /27:452 /28:47 /29:73 /30:25
/31:0 /32:15

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

ASN No of nets Total ann. Description
18566 2006 2051 MegaPath Corporation
36998 1786 1819 Sudanese Mobile Telephone (ZA
6389 1699 3032 BellSouth.net Inc.
8402 1671 1971 OJSC "Vimpelcom"
22773 1549 2299 Cox Communications, Inc.
30036 1219 1378 Mediacom Communications Corp
1785 1163 2147 PaeTec Communications, Inc.
11492 1145 1183 Cable One
6983 1034 1292 ITC^Deltacom
22561 977 1253 Digital Teleport, Inc

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

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

1:922 2:861 3:3 4:16 5:779 6:20
8:614 12:1885 13:3 14:897 15:11 16:3
17:19 18:19 20:36 23:619 24:1752 27:1702
31:1505 32:45 33:2 34:5 36:104 37:1917
38:919 39:5 40:182 41:3217 42:243 44:14
46:2085 47:10 49:704 50:862 52:12 54:44
55:4 56:4 57:25 58:1151 59:585 60:369
61:1498 62:1247 63:1978 64:4399 65:2333 66:4148
67:2121 68:1091 69:3290 70:907 71:509 72:2022
74:2580 75:322 76:305 77:1203 78:1020 79:672
80:1284 81:1053 82:633 83:753 84:598 85:1259
86:383 87:1038 88:521 89:1569 90:151 91:5730
92:621 93:1612 94:2092 95:1502 96:519 97:350
98:1079 99:41 100:32 101:695 103:3838 105:531
106:144 107:246 108:540 109:2010 110:967 111:1130
112:605 113:803 114:753 115:1047 116:1015 117:828
118:1229 119:1281 120:338 121:769 122:1881 123:1261
124:1383 125:1440 128:635 129:232 130:355 131:668
132:355 133:159 134:310 135:72 136:276 137:252
138:348 139:170 140:206 141:342 142:551 143:401
144:495 145:90 146:554 147:434 148:786 149:359
150:153 151:483 152:414 153:207 154:46 155:517
156:311 157:419 158:285 159:786 160:360 161:459
162:947 163:251 164:628 165:582 166:280 167:638
168:1042 169:123 170:1201 171:185 172:12 173:1671
174:662 175:542 176:1321 177:2551 178:1883 179:318
180:1605 181:889 182:1423 183:474 184:623 185:1125
186:2662 187:1470 188:1975 189:1258 190:7299 192:7078
193:5482 194:4033 195:3377 196:1335 197:1053 198:4793
199:5513 200:6059 201:2534 202:9025 203:8939 204:4535
205:2622 206:2891 207:2822 208:3964 209:3704 210:3096
211:1628 212:2176 213:1994 214:874 215:84 216:5434
217:1718 218:625 219:321 220:1270 221:587 222:332
223:554

End of report
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