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 23:15 +10GMT Wed 18 Dec, 2013

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

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

BGP routing table entries examined: 475269
Prefixes after maximum aggregation: 190134
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 236142
Total ASes present in the Internet Routing Table: 45749
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35487
Origin ASes announcing only one prefix: 16259
Transit ASes present in the Internet Routing Table: 5952
Transit-only ASes present in the Internet Routing Table: 172
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: 1061
Unregistered ASNs in the Routing Table: 301
Number of 32-bit ASNs allocated by the RIRs: 5520
Number of 32-bit ASNs visible in the Routing Table: 4310
Prefixes from 32-bit ASNs in the Routing Table: 13548
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: 1437
Number of addresses announced to Internet: 2660002692
Equivalent to 158 /8s, 140 /16s and 107 /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: 165667

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

Prefixes being announced by APNIC Region ASes: 113028
Total APNIC prefixes after maximum aggregation: 34167
APNIC Deaggregation factor: 3.31
Prefixes being announced from the APNIC address blocks: 115296
Unique aggregates announced from the APNIC address blocks: 48135
APNIC Region origin ASes present in the Internet Routing Table: 4875
APNIC Prefixes per ASN: 23.65
APNIC Region origin ASes announcing only one prefix: 1205
APNIC Region transit ASes present in the Internet Routing Table: 836
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: 795
Number of APNIC addresses announced to Internet: 729179328
Equivalent to 43 /8s, 118 /16s and 100 /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: 163408
Total ARIN prefixes after maximum aggregation: 81835
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 164188
Unique aggregates announced from the ARIN address blocks: 75895
ARIN Region origin ASes present in the Internet Routing Table: 15930
ARIN Prefixes per ASN: 10.31
ARIN Region origin ASes announcing only one prefix: 5999
ARIN Region transit ASes present in the Internet Routing Table: 1667
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: 48
Number of ARIN addresses announced to Internet: 1075182976
Equivalent to 64 /8s, 21 /16s and 253 /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: 119619
Total RIPE prefixes after maximum aggregation: 61305
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123341
Unique aggregates announced from the RIPE address blocks: 79255
RIPE Region origin ASes present in the Internet Routing Table: 17563
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8296
RIPE Region transit ASes present in the Internet Routing Table: 2826
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: 655700196
Equivalent to 39 /8s, 21 /16s and 48 /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: 53156
Total LACNIC prefixes after maximum aggregation: 9982
LACNIC Deaggregation factor: 5.33
Prefixes being announced from the LACNIC address blocks: 58585
Unique aggregates announced from the LACNIC address blocks: 27490
LACNIC Region origin ASes present in the Internet Routing Table: 2059
LACNIC Prefixes per ASN: 28.45
LACNIC Region origin ASes announcing only one prefix: 548
LACNIC Region transit ASes present in the Internet Routing Table: 395
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: 930
Number of LACNIC addresses announced to Internet: 146658080
Equivalent to 8 /8s, 189 /16s and 211 /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: 11752
Total AfriNIC prefixes after maximum aggregation: 2601
AfriNIC Deaggregation factor: 4.52
Prefixes being announced from the AfriNIC address blocks: 12422
Unique aggregates announced from the AfriNIC address blocks: 4241
AfriNIC Region origin ASes present in the Internet Routing Table: 700
AfriNIC Prefixes per ASN: 17.75
AfriNIC Region origin ASes announcing only one prefix: 211
AfriNIC Region transit ASes present in the Internet Routing Table: 147
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: 48575296
Equivalent to 2 /8s, 229 /16s and 51 /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 2119 319 110 TPG Internet Pty Ltd
4755 1802 392 191 TATA Communications formerly
9829 1555 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 3029 3688 53 BellSouth.net Inc.
22773 2301 2939 138 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 1838 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 853 357 32 JSC UKRTELECOM,
8551 846 370 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 3404 1837 93 NET Servicos de Comunicao S.A
10620 2690 435 209 Telmex Colombia S.A.
18881 1778 908 20 Global Village Telecom
7303 1740 1163 227 Telecom Argentina Stet-France
8151 1372 2857 429 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 836 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 870 338 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 3404 1837 93 NET Servicos de Comunicao S.A
6389 3029 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 2301 2939 138 Cox Communications, Inc.
1785 2146 686 131 PaeTec Communications, Inc.
7545 2119 319 110 TPG Internet Pty Ltd
18566 2050 379 178 MegaPath Corporation
8402 1838 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 3029 2976 BellSouth.net Inc.
17974 2731 2643 PT TELEKOMUNIKASI INDONESIA
10620 2690 2481 Telmex Colombia S.A.
22773 2301 2163 Cox Communications, Inc.
1785 2146 2015 PaeTec Communications, Inc.
7545 2119 2009 TPG Internet Pty Ltd
4766 2947 1996 Korea Telecom (KIX)
18566 2050 1872 MegaPath Corporation
8402 1838 1822 OJSC "Vimpelcom"
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 /14:937 /15:1637 /16:12842 /17:6752 /18:11347
/19:23156 /20:33020 /21:35766 /22:50554 /23:44006 /24:252077
/25:830 /26:980 /27:450 /28:12 /29:14 /30:5
/31:0 /32:9

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 3029 BellSouth.net Inc.
22773 1551 2301 Cox Communications, Inc.
8402 1540 1838 OJSC "Vimpelcom"
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 2:814 3:3 4:16 5:786 6:21
8:617 12:1884 13:3 14:898 15:9 16:3
17:19 18:19 20:36 23:619 24:1755 27:1700
31:1522 32:45 33:2 34:5 36:105 37:1911
38:922 39:3 40:182 41:3208 42:238 44:14
46:2095 47:10 49:705 50:855 52:12 54:44
55:7 56:4 57:26 58:1148 59:588 60:370
61:1500 62:1226 63:1977 64:4400 65:2332 66:4138
67:2123 68:1087 69:3293 70:908 71:509 72:2025
74:2581 75:322 76:305 77:1207 78:1030 79:674
80:1279 81:1084 82:639 83:754 84:631 85:1269
86:384 87:1017 88:521 89:1568 90:151 91:5730
92:623 93:1612 94:2095 95:1459 96:519 97:351
98:1082 99:41 100:32 101:692 103:3847 105:532
106:144 107:247 108:546 109:2038 110:966 111:1136
112:606 113:813 114:752 115:1044 116:1014 117:830
118:1234 119:1279 120:340 121:771 122:1882 123:1260
124:1387 125:1440 128:634 129:231 130:357 131:668
132:355 133:159 134:308 135:73 136:277 137:251
138:352 139:171 140:206 141:345 142:551 143:406
144:499 145:90 146:555 147:436 148:784 149:359
150:153 151:487 152:414 153:207 154:51 155:519
156:310 157:419 158:285 159:787 160:359 161:459
162:952 163:251 164:628 165:582 166:281 167:640
168:1044 169:123 170:1147 171:185 172:12 173:1730
174:672 175:546 176:1314 177:2573 178:1893 179:334
180:1602 181:892 182:1422 183:474 184:622 185:1127
186:2669 187:1472 188:1976 189:1266 190:7281 191:1
192:7061 193:5474 194:4032 195:3379 196:1351 197:1067
198:4802 199:5519 200:6053 201:2536 202:9029 203:8922
204:4532 205:2627 206:2902 207:2817 208:3963 209:3703
210:3082 211:1630 212:2177 213:1969 214:875 215:84
216:5429 217:1719 218:624 219:320 220:1272 221:587
222:332 223:563

End of report
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