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, December 2, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 03 Dec, 2013

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

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

BGP routing table entries examined: 474730
Prefixes after maximum aggregation: 189647
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234774
Total ASes present in the Internet Routing Table: 45601
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 35402
Origin ASes announcing only one prefix: 16274
Transit ASes present in the Internet Routing Table: 5977
Transit-only ASes present in the Internet Routing Table: 170
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: 1033
Unregistered ASNs in the Routing Table: 291
Number of 32-bit ASNs allocated by the RIRs: 5435
Number of 32-bit ASNs visible in the Routing Table: 4222
Prefixes from 32-bit ASNs in the Routing Table: 13397
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: 1245
Number of addresses announced to Internet: 2656912700
Equivalent to 158 /8s, 93 /16s and 69 /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: 165967

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

Prefixes being announced by APNIC Region ASes: 112523
Total APNIC prefixes after maximum aggregation: 34092
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 114830
Unique aggregates announced from the APNIC address blocks: 47869
APNIC Region origin ASes present in the Internet Routing Table: 4872
APNIC Prefixes per ASN: 23.57
APNIC Region origin ASes announcing only one prefix: 1219
APNIC Region transit ASes present in the Internet Routing Table: 840
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 767
Number of APNIC addresses announced to Internet: 728476864
Equivalent to 43 /8s, 107 /16s and 172 /24s
Percentage of available APNIC address space announced: 85.1

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 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: 163933
Total ARIN prefixes after maximum aggregation: 81667
ARIN Deaggregation factor: 2.01
Prefixes being announced from the ARIN address blocks: 164733
Unique aggregates announced from the ARIN address blocks: 75873
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: 6003
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: 40
Number of ARIN addresses announced to Internet: 1073853056
Equivalent to 64 /8s, 1 /16s and 178 /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: 119374
Total RIPE prefixes after maximum aggregation: 61097
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123152
Unique aggregates announced from the RIPE address blocks: 78733
RIPE Region origin ASes present in the Internet Routing Table: 17545
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8290
RIPE Region transit ASes present in the Internet Routing Table: 2838
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 103
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2500
Number of RIPE addresses announced to Internet: 656174052
Equivalent to 39 /8s, 28 /16s and 107 /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: 53077
Total LACNIC prefixes after maximum aggregation: 9994
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58408
Unique aggregates announced from the LACNIC address blocks: 27291
LACNIC Region origin ASes present in the Internet Routing Table: 2047
LACNIC Prefixes per ASN: 28.53
LACNIC Region origin ASes announcing only one prefix: 552
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: 908
Number of LACNIC addresses announced to Internet: 145745688
Equivalent to 8 /8s, 175 /16s and 231 /24s
Percentage of available LACNIC address space announced: 86.9

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: 11694
Total AfriNIC prefixes after maximum aggregation: 2579
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12362
Unique aggregates announced from the AfriNIC address blocks: 4009
AfriNIC Region origin ASes present in the Internet Routing Table: 687
AfriNIC Prefixes per ASN: 17.99
AfriNIC Region origin ASes announcing only one prefix: 210
AfriNIC Region transit ASes present in the Internet Routing Table: 143
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 48483840
Equivalent to 2 /8s, 227 /16s and 206 /24s
Percentage of available AfriNIC address space announced: 48.2

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 2709 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2113 319 111 TPG Internet Pty Ltd
4755 1793 392 190 TATA Communications formerly
9829 1543 1245 45 BSNL National Internet Backbo
9583 1251 95 510 Sify Limited
9498 1217 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1146 2119 337 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 1506 11144 780 MCI Communications Services,
7029 1468 1241 163 Windstream Communications Inc
30036 1391 313 583 Mediacom Communications Corp
7018 1332 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 1974 544 16 OJSC "Vimpelcom"
34984 1365 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1179 445 890 Akamai Technologies European
31148 1010 45 20 FreeNet ISP
13188 896 99 48 TOV "Bank-Inform"
6849 856 363 39 JSC UKRTELECOM,
8551 786 370 41 Bezeq International
6830 772 2327 424 UPC Distribution Services
12479 676 798 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 3412 1807 90 NET Servicos de Comunicao S.A
10620 2673 433 213 Telmex Colombia S.A.
7303 1730 1151 233 Telecom Argentina Stet-France
18881 1706 908 20 Global Village Telecom
8151 1362 2852 422 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 849 93 90 Telconet S.A
6147 787 373 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 1854 112 5 Sudanese Mobile Telephone (ZA
24863 870 338 26 LINKdotNET AS number
6713 551 633 26 Itissalat Al-MAGHRIB
8452 408 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 251 921 209 The Internet Solution
36992 234 471 25 Etisalat MISR
29571 229 21 15 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 3412 1807 90 NET Servicos de Comunicao S.A
6389 3042 3688 53 BellSouth.net Inc.
4766 2930 11557 940 Korea Telecom (KIX)
17974 2709 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2673 433 213 Telmex Colombia S.A.
22773 2208 2939 136 Cox Communications, Inc.
7545 2113 319 111 TPG Internet Pty Ltd
18566 2053 379 178 MegaPath Corporation
1785 2044 685 132 PaeTec Communications, Inc.
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 3042 2989 BellSouth.net Inc.
17974 2709 2621 PT TELEKOMUNIKASI INDONESIA
10620 2673 2460 Telmex Colombia S.A.
22773 2208 2072 Cox Communications, Inc.
7545 2113 2002 TPG Internet Pty Ltd
4766 2930 1990 Korea Telecom (KIX)
8402 1974 1958 OJSC "Vimpelcom"
1785 2044 1912 PaeTec Communications, Inc.
18566 2053 1875 MegaPath Corporation
36998 1854 1849 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 /15:1639 /16:12858 /17:6795 /18:11308
/19:23178 /20:33035 /21:35640 /22:50205 /23:44103 /24:251674
/25:870 /26:994 /27:467 /28:47 /29:72 /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 1819 1854 Sudanese Mobile Telephone (ZA
6389 1700 3042 BellSouth.net Inc.
8402 1657 1974 OJSC "Vimpelcom"
22773 1462 2208 Cox Communications, Inc.
30036 1232 1391 Mediacom Communications Corp
11492 1196 1234 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)
----------------------------------------------

1:911 2:874 3:3 4:17 5:807 6:21
8:610 12:1875 13:3 14:902 15:11 16:3
17:18 18:19 20:25 23:609 24:1761 27:1702
31:1519 32:45 33:2 34:5 36:95 37:1940
38:917 39:5 40:185 41:3268 42:324 44:14
46:2064 47:10 49:695 50:855 52:12 54:44
55:5 56:4 57:26 58:1171 59:581 60:368
61:1490 62:1237 63:1978 64:4401 65:2357 66:4250
67:2105 68:1114 69:3309 70:949 71:515 72:2024
74:2634 75:394 76:304 77:1216 78:1077 79:668
80:1275 81:1054 82:630 83:692 84:590 85:1252
86:382 87:1034 88:551 89:1551 90:155 91:5680
92:613 93:1609 94:2083 95:1536 96:515 97:348
98:1084 99:41 100:31 101:655 103:3729 105:530
106:143 107:217 108:537 109:2004 110:976 111:1125
112:596 113:803 114:766 115:1060 116:1003 117:836
118:1216 119:1288 120:341 121:762 122:1875 123:1271
124:1414 125:1434 128:657 129:232 130:354 131:669
132:353 133:158 134:306 135:72 136:276 137:251
138:351 139:181 140:200 141:336 142:549 143:399
144:501 145:90 146:552 147:435 148:776 149:368
150:152 151:607 152:413 153:207 154:42 155:506
156:310 157:420 158:284 159:783 160:359 161:458
162:917 163:227 164:626 165:580 166:283 167:637
168:1038 169:125 170:1108 171:185 172:12 173:1671
174:721 175:539 176:1331 177:2524 178:1876 179:297
180:1600 181:881 182:1411 183:477 184:634 185:1084
186:2656 187:1461 188:1864 189:1255 190:7275 192:7087
193:5444 194:4028 195:3362 196:1322 197:1036 198:4748
199:5505 200:6059 201:2525 202:9027 203:8858 204:4542
205:2648 206:2887 207:2812 208:3962 209:3672 210:3074
211:1598 212:2142 213:1990 214:888 215:84 216:5452
217:1711 218:634 219:324 220:1276 221:587 222:332
223:522

End of report
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