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.

Saturday, November 30, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 01 Dec, 2013

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

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

BGP routing table entries examined: 474887
Prefixes after maximum aggregation: 189704
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234834
Total ASes present in the Internet Routing Table: 45591
Prefixes per ASN: 10.42
Origin-only ASes present in the Internet Routing Table: 35423
Origin ASes announcing only one prefix: 16272
Transit ASes present in the Internet Routing Table: 5956
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: 103
Max AS path prepend of ASN ( 50404) 101
Prefixes from unregistered ASNs in the Routing Table: 1026
Unregistered ASNs in the Routing Table: 289
Number of 32-bit ASNs allocated by the RIRs: 5427
Number of 32-bit ASNs visible in the Routing Table: 4212
Prefixes from 32-bit ASNs in the Routing Table: 13253
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: 1243
Number of addresses announced to Internet: 2657310556
Equivalent to 158 /8s, 99 /16s and 87 /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: 166149

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

Prefixes being announced by APNIC Region ASes: 112503
Total APNIC prefixes after maximum aggregation: 34098
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 114689
Unique aggregates announced from the APNIC address blocks: 47864
APNIC Region origin ASes present in the Internet Routing Table: 4870
APNIC Prefixes per ASN: 23.55
APNIC Region origin ASes announcing only one prefix: 1210
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: 35
Number of APNIC region 32-bit ASNs visible in the Routing Table: 763
Number of APNIC addresses announced to Internet: 728751552
Equivalent to 43 /8s, 111 /16s and 221 /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: 163964
Total ARIN prefixes after maximum aggregation: 81675
ARIN Deaggregation factor: 2.01
Prefixes being announced from the ARIN address blocks: 164778
Unique aggregates announced from the ARIN address blocks: 75918
ARIN Region origin ASes present in the Internet Routing Table: 15937
ARIN Prefixes per ASN: 10.34
ARIN Region origin ASes announcing only one prefix: 6008
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: 1073883008
Equivalent to 64 /8s, 2 /16s and 39 /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: 119640
Total RIPE prefixes after maximum aggregation: 61106
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123388
Unique aggregates announced from the RIPE address blocks: 78748
RIPE Region origin ASes present in the Internet Routing Table: 17547
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8297
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: 2498
Number of RIPE addresses announced to Internet: 656260580
Equivalent to 39 /8s, 29 /16s and 189 /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: 53116
Total LACNIC prefixes after maximum aggregation: 10030
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 58434
Unique aggregates announced from the LACNIC address blocks: 27281
LACNIC Region origin ASes present in the Internet Routing Table: 2044
LACNIC Prefixes per ASN: 28.59
LACNIC Region origin ASes announcing only one prefix: 548
LACNIC Region transit ASes present in the Internet Routing Table: 397
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: 903
Number of LACNIC addresses announced to Internet: 145687608
Equivalent to 8 /8s, 175 /16s and 4 /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: 11679
Total AfriNIC prefixes after maximum aggregation: 2586
AfriNIC Deaggregation factor: 4.52
Prefixes being announced from the AfriNIC address blocks: 12355
Unique aggregates announced from the AfriNIC address blocks: 4025
AfriNIC Region origin ASes present in the Internet Routing Table: 685
AfriNIC Prefixes per ASN: 18.04
AfriNIC Region origin ASes announcing only one prefix: 209
AfriNIC Region transit ASes present in the Internet Routing Table: 141
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: 48550400
Equivalent to 2 /8s, 228 /16s and 210 /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 2719 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 1216 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1145 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 1909 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 786 370 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 420 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 820 94 92 Telconet S.A
6147 789 373 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 1864 112 5 Sudanese Mobile Telephone (ZA
24863 868 338 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
36992 234 471 25 Etisalat MISR
29571 229 21 15 Ci Telecom Autonomous system
15706 221 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 3405 1807 90 NET Servicos de Comunicao S.A
6389 3042 3688 53 BellSouth.net Inc.
4766 2930 11557 940 Korea Telecom (KIX)
17974 2719 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 1909 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 2719 2631 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)
1785 2044 1912 PaeTec Communications, Inc.
8402 1909 1893 OJSC "Vimpelcom"
18566 2053 1875 MegaPath Corporation
36998 1864 1859 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 /16:12855 /17:6786 /18:11344
/19:23179 /20:33023 /21:35702 /22:50186 /23:44087 /24:251796
/25:873 /26:996 /27:469 /28:42 /29:69 /30:15
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2008 2053 MegaPath Corporation
36998 1829 1864 Sudanese Mobile Telephone (ZA
6389 1700 3042 BellSouth.net Inc.
8402 1592 1909 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 2:836 3:3 4:17 5:1028 6:21
8:610 12:1875 13:3 14:899 15:11 16:3
17:18 18:19 20:25 23:606 24:1760 27:1700
31:1522 32:45 33:2 34:5 36:95 37:1941
38:918 39:5 40:185 41:3254 42:227 44:14
46:2075 47:10 49:691 50:856 52:12 54:44
55:5 56:4 57:26 58:1170 59:579 60:368
61:1489 62:1241 63:1977 64:4401 65:2356 66:4251
67:2103 68:1114 69:3306 70:949 71:515 72:2024
74:2635 75:394 76:304 77:1218 78:1077 79:668
80:1276 81:1053 82:632 83:690 84:591 85:1258
86:382 87:1023 88:549 89:1552 90:154 91:5702
92:611 93:1611 94:2086 95:1515 96:515 97:348
98:1086 99:41 100:33 101:659 103:3744 105:530
106:143 107:218 108:537 109:2001 110:961 111:1125
112:594 113:805 114:766 115:1061 116:1001 117:838
118:1214 119:1292 120:342 121:759 122:1876 123:1271
124:1413 125:1433 128:659 129:232 130:353 131:670
132:352 133:158 134:305 135:72 136:276 137:250
138:349 139:181 140:200 141:336 142:549 143:395
144:500 145:90 146:551 147:434 148:775 149:370
150:153 151:664 152:413 153:207 154:53 155:506
156:306 157:420 158:284 159:783 160:361 161:457
162:919 163:227 164:626 165:585 166:283 167:636
168:1042 169:125 170:1109 171:185 172:12 173:1671
174:721 175:538 176:1333 177:2525 178:1881 179:295
180:1599 181:877 182:1411 183:473 184:639 185:1076
186:2640 187:1460 188:1863 189:1255 190:7282 192:7077
193:5436 194:4031 195:3361 196:1339 197:1032 198:4750
199:5510 200:6060 201:2523 202:9007 203:8896 204:4542
205:2652 206:2852 207:2811 208:3966 209:3672 210:3069
211:1592 212:2151 213:2001 214:888 215:86 216:5452
217:1707 218:632 219:323 220:1276 221:586 222:332
223:524

End of report
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