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 1, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 02 Dec, 2013

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

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

BGP routing table entries examined: 474602
Prefixes after maximum aggregation: 189657
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234793
Total ASes present in the Internet Routing Table: 45587
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 35406
Origin ASes announcing only one prefix: 16268
Transit ASes present in the Internet Routing Table: 5961
Transit-only ASes present in the Internet Routing Table: 171
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 103
Max AS path prepend of ASN ( 50404) 101
Prefixes from unregistered ASNs in the Routing Table: 1003
Unregistered ASNs in the Routing Table: 283
Number of 32-bit ASNs allocated by the RIRs: 5434
Number of 32-bit ASNs visible in the Routing Table: 4220
Prefixes from 32-bit ASNs in the Routing Table: 13382
Number of bogon 32-bit ASNs visible in the Routing Table: 2
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1244
Number of addresses announced to Internet: 2657103196
Equivalent to 158 /8s, 96 /16s and 45 /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: 165942

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

Prefixes being announced by APNIC Region ASes: 112478
Total APNIC prefixes after maximum aggregation: 34083
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 114787
Unique aggregates announced from the APNIC address blocks: 47883
APNIC Region origin ASes present in the Internet Routing Table: 4872
APNIC Prefixes per ASN: 23.56
APNIC Region origin ASes announcing only one prefix: 1213
APNIC Region transit ASes present in the Internet Routing Table: 836
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 769
Number of APNIC addresses announced to Internet: 728772288
Equivalent to 43 /8s, 112 /16s and 46 /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: 163950
Total ARIN prefixes after maximum aggregation: 81683
ARIN Deaggregation factor: 2.01
Prefixes being announced from the ARIN address blocks: 164749
Unique aggregates announced from the ARIN address blocks: 75914
ARIN Region origin ASes present in the Internet Routing Table: 15934
ARIN Prefixes per ASN: 10.34
ARIN Region origin ASes announcing only one prefix: 6005
ARIN Region transit ASes present in the Internet Routing Table: 1664
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: 40
Number of ARIN addresses announced to Internet: 1073850752
Equivalent to 64 /8s, 1 /16s and 169 /24s
Percentage of available ARIN address space announced: 56.8

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, 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: 119560
Total RIPE prefixes after maximum aggregation: 61105
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123352
Unique aggregates announced from the RIPE address blocks: 78727
RIPE Region origin ASes present in the Internet Routing Table: 17546
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8293
RIPE Region transit ASes present in the Internet Routing Table: 2825
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 103
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2497
Number of RIPE addresses announced to Internet: 656191204
Equivalent to 39 /8s, 28 /16s and 174 /24s
Percentage of available RIPE address space announced: 95.4

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: 53112
Total LACNIC prefixes after maximum aggregation: 10016
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 58436
Unique aggregates announced from the LACNIC address blocks: 27282
LACNIC Region origin ASes present in the Internet Routing Table: 2048
LACNIC Prefixes per ASN: 28.53
LACNIC Region origin ASes announcing only one prefix: 553
LACNIC Region transit ASes present in the Internet Routing Table: 402
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: 906
Number of LACNIC addresses announced to Internet: 145691192
Equivalent to 8 /8s, 175 /16s and 18 /24s
Percentage of available LACNIC address space announced: 86.8

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: 11411
Total AfriNIC prefixes after maximum aggregation: 2561
AfriNIC Deaggregation factor: 4.46
Prefixes being announced from the AfriNIC address blocks: 12034
Unique aggregates announced from the AfriNIC address blocks: 3989
AfriNIC Region origin ASes present in the Internet Routing Table: 672
AfriNIC Prefixes per ASN: 17.91
AfriNIC Region origin ASes announcing only one prefix: 204
AfriNIC Region transit ASes present in the Internet Routing Table: 140
Average AfriNIC Region AS path length visible: 4.6
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: 48420352
Equivalent to 2 /8s, 226 /16s and 214 /24s
Percentage of available AfriNIC address space announced: 48.1

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 2930 11557 940 Korea Telecom (KIX)
17974 2717 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2112 319 110 TPG Internet Pty Ltd
4755 1793 392 190 TATA Communications formerly
9829 1536 1244 47 BSNL National Internet Backbo
9583 1251 95 510 Sify Limited
9498 1216 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1147 2119 336 CNCGROUP IP network: China169
24560 1102 382 166 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 3042 3688 53 BellSouth.net Inc.
22773 2208 2939 136 Cox Communications, Inc.
18566 2053 379 178 MegaPath Corporation
1785 2044 685 132 PaeTec Communications, Inc.
20115 1684 1653 600 Charter Communications
4323 1643 1098 420 Time Warner Telecom
701 1507 11144 781 MCI Communications Services,
7029 1468 1241 163 Windstream Communications Inc
30036 1391 313 583 Mediacom Communications Corp
7018 1333 17779 872 AT&T WorldNet Services

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 1953 544 16 OJSC "Vimpelcom"
34984 1365 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1190 453 888 Akamai Technologies European
31148 1010 45 20 FreeNet ISP
13188 896 99 48 TOV "Bank-Inform"
6849 856 363 39 JSC UKRTELECOM,
8551 785 370 41 Bezeq International
6830 772 2327 424 UPC Distribution Services
12479 680 798 53 Uni2 Autonomous System
35228 549 246 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 3405 1807 90 NET Servicos de Comunicao S.A
10620 2673 433 213 Telmex Colombia S.A.
7303 1729 1151 232 Telecom Argentina Stet-France
18881 1706 908 20 Global Village Telecom
8151 1360 2852 419 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 845 93 90 Telconet S.A
6147 785 373 27 Telefonica Del Peru
7738 780 1498 36 Telecomunicacoes da Bahia S.A
6503 775 434 60 AVANTEL, 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 1828 112 5 Sudanese Mobile Telephone (ZA
24863 870 338 26 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 412 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 251 921 209 The Internet Solution
29571 229 21 15 Ci Telecom Autonomous system
36992 222 501 29 Etisalat MISR
29975 192 668 21 Vodacom
12258 183 27 65 Vodacom Internet Company

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 3405 1807 90 NET Servicos de Comunicao S.A
6389 3042 3688 53 BellSouth.net Inc.
4766 2930 11557 940 Korea Telecom (KIX)
17974 2717 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2673 433 213 Telmex Colombia S.A.
22773 2208 2939 136 Cox Communications, Inc.
7545 2112 319 110 TPG Internet Pty Ltd
18566 2053 379 178 MegaPath Corporation
1785 2044 685 132 PaeTec Communications, Inc.
8402 1953 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 3042 2989 BellSouth.net Inc.
17974 2717 2629 PT TELEKOMUNIKASI INDONESIA
10620 2673 2460 Telmex Colombia S.A.
22773 2208 2072 Cox Communications, Inc.
7545 2112 2002 TPG Internet Pty Ltd
4766 2930 1990 Korea Telecom (KIX)
8402 1953 1937 OJSC "Vimpelcom"
1785 2044 1912 PaeTec Communications, Inc.
18566 2053 1875 MegaPath Corporation
36998 1828 1823 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
65160 PRIVATE 12.1.58.0/24 17361 Sungard Trading Syst
65160 PRIVATE 12.1.59.0/24 17361 Sungard Trading Syst
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

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
100.100.0.0/24 4847 China Networks Inter-Exchange

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

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 /12:253
/13:476 /14:932 /15:1640 /16:12850 /17:6788 /18:11331
/19:23163 /20:33013 /21:35642 /22:50186 /23:44083 /24:251605
/25:875 /26:994 /27:468 /28:48 /29:71 /30:20
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2008 2053 MegaPath Corporation
36998 1793 1828 Sudanese Mobile Telephone (ZA
6389 1700 3042 BellSouth.net Inc.
8402 1636 1953 OJSC "Vimpelcom"
22773 1462 2208 Cox Communications, Inc.
30036 1232 1391 Mediacom Communications Corp
11492 1195 1233 Cable One
1785 1088 2044 PaeTec Communications, Inc.
7029 1046 1468 Windstream Communications Inc
6983 1035 1293 ITC^Deltacom

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

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

1:908 2:870 3:3 4:17 5:1023 6:21
8:610 12:1875 13:3 14:901 15:11 16:3
17:18 18:19 20:25 23:606 24:1760 27:1684
31:1518 32:45 33:2 34:5 36:95 37:1941
38:918 39:5 40:185 41:3084 42:325 44:14
46:2075 47:10 49:697 50:855 52:12 54:44
55:5 56:4 57:26 58:1170 59:578 60:368
61:1493 62:1235 63:1974 64:4402 65:2356 66:4249
67:2103 68:1114 69:3307 70:949 71:515 72:2023
74:2634 75:394 76:303 77:1218 78:1078 79:669
80:1276 81:1054 82:630 83:690 84:591 85:1256
86:382 87:1025 88:550 89:1552 90:157 91:5680
92:612 93:1610 94:2076 95:1512 96:515 97:348
98:1086 99:41 100:31 101:659 103:3747 105:530
106:143 107:217 108:537 109:2008 110:970 111:1125
112:596 113:804 114:765 115:1059 116:1001 117:836
118:1216 119:1293 120:342 121:761 122:1873 123:1265
124:1401 125:1432 128:658 129:232 130:353 131:669
132:353 133:158 134:305 135:72 136:276 137:251
138:351 139:181 140:200 141:336 142:549 143:396
144:501 145:90 146:544 147:434 148:775 149:370
150:153 151:664 152:413 153:207 154:37 155:506
156:306 157:420 158:284 159:783 160:361 161:458
162:919 163:227 164:626 165:579 166:283 167:636
168:1042 169:125 170:1109 171:185 172:12 173:1669
174:721 175:538 176:1333 177:2526 178:1879 179:296
180:1598 181:877 182:1411 183:474 184:634 185:1081
186:2645 187:1466 188:1864 189:1254 190:7295 192:7082
193:5437 194:4024 195:3363 196:1315 197:995 198:4750
199:5509 200:6054 201:2521 202:9001 203:8889 204:4540
205:2652 206:2851 207:2813 208:3965 209:3671 210:3074
211:1594 212:2137 213:2006 214:889 215:86 216:5444
217:1713 218:633 219:323 220:1276 221:584 222:332
223:524

End of report
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