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.

Wednesday, December 18, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 475575
Prefixes after maximum aggregation: 190222
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 236214
Total ASes present in the Internet Routing Table: 45754
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35490
Origin ASes announcing only one prefix: 16263
Transit ASes present in the Internet Routing Table: 5952
Transit-only ASes present in the Internet Routing Table: 173
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: 1059
Unregistered ASNs in the Routing Table: 299
Number of 32-bit ASNs allocated by the RIRs: 5534
Number of 32-bit ASNs visible in the Routing Table: 4312
Prefixes from 32-bit ASNs in the Routing Table: 13562
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: 1434
Number of addresses announced to Internet: 2659944348
Equivalent to 158 /8s, 139 /16s and 135 /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: 165889

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

Prefixes being announced by APNIC Region ASes: 113017
Total APNIC prefixes after maximum aggregation: 34165
APNIC Deaggregation factor: 3.31
Prefixes being announced from the APNIC address blocks: 115288
Unique aggregates announced from the APNIC address blocks: 48137
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: 1204
APNIC Region transit ASes present in the Internet Routing Table: 837
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: 796
Number of APNIC addresses announced to Internet: 729179584
Equivalent to 43 /8s, 118 /16s and 101 /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: 163396
Total ARIN prefixes after maximum aggregation: 81834
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 164178
Unique aggregates announced from the ARIN address blocks: 75910
ARIN Region origin ASes present in the Internet Routing Table: 15933
ARIN Prefixes per ASN: 10.30
ARIN Region origin ASes announcing only one prefix: 6004
ARIN Region transit ASes present in the Internet Routing Table: 1663
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: 47
Number of ARIN addresses announced to Internet: 1075082624
Equivalent to 64 /8s, 20 /16s and 117 /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: 119729
Total RIPE prefixes after maximum aggregation: 61341
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123460
Unique aggregates announced from the RIPE address blocks: 79267
RIPE Region origin ASes present in the Internet Routing Table: 17568
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8298
RIPE Region transit ASes present in the Internet Routing Table: 2828
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: 2530
Number of RIPE addresses announced to Internet: 655725540
Equivalent to 39 /8s, 21 /16s and 147 /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: 53323
Total LACNIC prefixes after maximum aggregation: 10038
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58759
Unique aggregates announced from the LACNIC address blocks: 27532
LACNIC Region origin ASes present in the Internet Routing Table: 2058
LACNIC Prefixes per ASN: 28.55
LACNIC Region origin ASes announcing only one prefix: 547
LACNIC Region transit ASes present in the Internet Routing Table: 399
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: 931
Number of LACNIC addresses announced to Internet: 146678328
Equivalent to 8 /8s, 190 /16s and 34 /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: 11792
Total AfriNIC prefixes after maximum aggregation: 2602
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12456
Unique aggregates announced from the AfriNIC address blocks: 4245
AfriNIC Region origin ASes present in the Internet Routing Table: 699
AfriNIC Prefixes per ASN: 17.82
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: 48572992
Equivalent to 2 /8s, 229 /16s and 42 /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 2947 11558 951 Korea Telecom (KIX)
17974 2731 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2116 319 111 TPG Internet Pty Ltd
4755 1802 392 191 TATA Communications formerly
9829 1554 1251 42 BSNL National Internet Backbo
9583 1323 102 545 Sify Limited
9498 1229 309 72 BHARTI Airtel Ltd.
7552 1176 1080 13 Vietel Corporation
4808 1142 2119 341 CNCGROUP IP network: China169
24560 1098 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 3028 3688 53 BellSouth.net Inc.
22773 2302 2939 139 Cox Communications, Inc.
1785 2146 686 131 PaeTec Communications, Inc.
18566 2050 379 178 MegaPath Corporation
20115 1680 1661 596 Charter Communications
4323 1631 1081 413 Time Warner Telecom
701 1508 11144 779 MCI Communications Services,
30036 1375 309 574 Mediacom Communications Corp
7018 1311 17746 856 AT&T WorldNet Services
6983 1295 756 580 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 1974 544 16 OJSC "Vimpelcom"
34984 1367 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1215 460 914 Akamai Technologies European
31148 1011 45 19 FreeNet ISP
13188 899 99 42 TOV "Bank-Inform"
6849 859 363 38 JSC UKRTELECOM,
8551 845 370 38 Bezeq International
6830 772 2327 425 UPC Distribution Services
12479 682 798 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 3417 1837 90 NET Servicos de Comunicao S.A
10620 2690 435 209 Telmex Colombia S.A.
18881 1778 908 20 Global Village Telecom
7303 1741 1163 228 Telecom Argentina Stet-France
8151 1371 2857 429 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 857 93 89 Telconet S.A
6503 791 434 60 AVANTEL, S.A.
6147 789 373 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 894 338 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 238 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 3417 1837 90 NET Servicos de Comunicao S.A
6389 3028 3688 53 BellSouth.net Inc.
4766 2947 11558 951 Korea Telecom (KIX)
17974 2731 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2690 435 209 Telmex Colombia S.A.
22773 2302 2939 139 Cox Communications, Inc.
1785 2146 686 131 PaeTec Communications, Inc.
7545 2116 319 111 TPG Internet Pty Ltd
18566 2050 379 178 MegaPath Corporation
8402 1974 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 3028 2975 BellSouth.net Inc.
17974 2731 2643 PT TELEKOMUNIKASI INDONESIA
10620 2690 2481 Telmex Colombia S.A.
22773 2302 2163 Cox Communications, Inc.
1785 2146 2015 PaeTec Communications, Inc.
7545 2116 2005 TPG Internet Pty Ltd
4766 2947 1996 Korea Telecom (KIX)
8402 1974 1958 OJSC "Vimpelcom"
18566 2050 1872 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
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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

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.
23.91.160.0/19 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 /12:252
/13:473 /14:936 /15:1637 /16:12843 /17:6755 /18:11348
/19:23172 /20:33009 /21:35776 /22:50582 /23:43992 /24:252228
/25:829 /26:983 /27:450 /28:48 /29:72 /30:25
/31:0 /32:15

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

ASN No of nets Total ann. Description
18566 2005 2050 MegaPath Corporation
36998 1786 1819 Sudanese Mobile Telephone (ZA
6389 1699 3028 BellSouth.net Inc.
8402 1675 1974 OJSC "Vimpelcom"
22773 1552 2302 Cox Communications, Inc.
30036 1216 1375 Mediacom Communications Corp
1785 1163 2146 PaeTec Communications, Inc.
11492 1148 1185 Cable One
6983 1037 1295 ITC^Deltacom
22561 977 1252 Digital Teleport, Inc

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

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

1:916 2:873 3:3 4:16 5:788 6:21
8:617 12:1884 13:3 14:895 15:9 16:3
17:19 18:19 20:36 23:619 24:1755 27:1700
31:1499 32:45 33:2 34:5 36:105 37:1920
38:922 39:3 40:182 41:3214 42:238 44:14
46:2094 47:10 49:705 50:858 52:12 54:44
55:5 56:4 57:26 58:1147 59:587 60:370
61:1499 62:1229 63:1976 64:4399 65:2334 66:4137
67:2123 68:1087 69:3295 70:908 71:509 72:2025
74:2580 75:322 76:305 77:1208 78:1030 79:674
80:1278 81:1084 82:644 83:754 84:631 85:1268
86:384 87:1016 88:520 89:1567 90:151 91:5728
92:623 93:1603 94:2099 95:1504 96:519 97:351
98:1081 99:41 100:32 101:692 103:3848 105:532
106:144 107:246 108:546 109:2038 110:967 111:1136
112:606 113:814 114:754 115:1043 116:1009 117:830
118:1234 119:1278 120:340 121:771 122:1881 123:1260
124:1387 125:1442 128:639 129:231 130:357 131:668
132:355 133:159 134:309 135:73 136:277 137:252
138:352 139:171 140:205 141:345 142:551 143:403
144:498 145:90 146:555 147:437 148:786 149:359
150:153 151:487 152:414 153:207 154:51 155:521
156:310 157:419 158:285 159:787 160:359 161:459
162:952 163:252 164:628 165:583 166:281 167:640
168:1044 169:123 170:1148 171:185 172:12 173:1729
174:672 175:546 176:1335 177:2580 178:1884 179:329
180:1602 181:900 182:1422 183:476 184:621 185:1128
186:2675 187:1473 188:1957 189:1247 190:7302 192:7064
193:5475 194:4032 195:3379 196:1350 197:1075 198:4797
199:5524 200:6066 201:2544 202:9027 203:8921 204:4535
205:2633 206:2898 207:2817 208:3963 209:3704 210:3082
211:1630 212:2180 213:1971 214:877 215:84 216:5427
217:1722 218:624 219:320 220:1272 221:587 222:332
223:563

End of report
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