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.

Thursday, June 13, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 14 Jun, 2013

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

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

BGP routing table entries examined: 455324
Prefixes after maximum aggregation: 185798
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 225921
Total ASes present in the Internet Routing Table: 44309
Prefixes per ASN: 10.28
Origin-only ASes present in the Internet Routing Table: 34696
Origin ASes announcing only one prefix: 16153
Transit ASes present in the Internet Routing Table: 5898
Transit-only ASes present in the Internet Routing Table: 150
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 55
Max AS path prepend of ASN ( 56484) 51
Prefixes from unregistered ASNs in the Routing Table: 830
Unregistered ASNs in the Routing Table: 345
Number of 32-bit ASNs allocated by the RIRs: 4791
Number of 32-bit ASNs visible in the Routing Table: 3715
Prefixes from 32-bit ASNs in the Routing Table: 10799
Special use prefixes present in the Routing Table: 26
Prefixes being announced from unallocated address space: 228
Number of addresses announced to Internet: 2642663820
Equivalent to 157 /8s, 131 /16s and 217 /24s
Percentage of available address space announced: 71.4
Percentage of allocated address space announced: 71.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.6
Total number of prefixes smaller than registry allocations: 159299

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

Prefixes being announced by APNIC Region ASes: 109522
Total APNIC prefixes after maximum aggregation: 33521
APNIC Deaggregation factor: 3.27
Prefixes being announced from the APNIC address blocks: 111034
Unique aggregates announced from the APNIC address blocks: 45231
APNIC Region origin ASes present in the Internet Routing Table: 4856
APNIC Prefixes per ASN: 22.87
APNIC Region origin ASes announcing only one prefix: 1225
APNIC Region transit ASes present in the Internet Routing Table: 827
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 571
Number of APNIC addresses announced to Internet: 725178336
Equivalent to 43 /8s, 57 /16s and 87 /24s
Percentage of available APNIC address space announced: 84.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 158931
Total ARIN prefixes after maximum aggregation: 80373
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159514
Unique aggregates announced from the ARIN address blocks: 73935
ARIN Region origin ASes present in the Internet Routing Table: 15733
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5983
ARIN Region transit ASes present in the Internet Routing Table: 1652
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 19
Number of ARIN addresses announced to Internet: 1081922624
Equivalent to 64 /8s, 124 /16s and 212 /24s
Percentage of available ARIN address space announced: 57.2

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: 117042
Total RIPE prefixes after maximum aggregation: 60020
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 120622
Unique aggregates announced from the RIPE address blocks: 77828
RIPE Region origin ASes present in the Internet Routing Table: 17225
RIPE Prefixes per ASN: 7.00
RIPE Region origin ASes announcing only one prefix: 8164
RIPE Region transit ASes present in the Internet Routing Table: 2842
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2359
Number of RIPE addresses announced to Internet: 656562532
Equivalent to 39 /8s, 34 /16s and 89 /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, 196608-199679
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: 48122
Total LACNIC prefixes after maximum aggregation: 9343
LACNIC Deaggregation factor: 5.15
Prefixes being announced from the LACNIC address blocks: 52523
Unique aggregates announced from the LACNIC address blocks: 24806
LACNIC Region origin ASes present in the Internet Routing Table: 1963
LACNIC Prefixes per ASN: 26.76
LACNIC Region origin ASes announcing only one prefix: 590
LACNIC Region transit ASes present in the Internet Routing Table: 364
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 760
Number of LACNIC addresses announced to Internet: 132007944
Equivalent to 7 /8s, 222 /16s and 72 /24s
Percentage of available LACNIC address space announced: 78.7

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-62463, 262144-263167 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: 10813
Total AfriNIC prefixes after maximum aggregation: 2500
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 11403
Unique aggregates announced from the AfriNIC address blocks: 3910
AfriNIC Region origin ASes present in the Internet Routing Table: 639
AfriNIC Prefixes per ASN: 17.85
AfriNIC Region origin ASes announcing only one prefix: 191
AfriNIC Region transit ASes present in the Internet Routing Table: 129
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46696704
Equivalent to 2 /8s, 200 /16s and 137 /24s
Percentage of available AfriNIC address space announced: 46.4

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 2948 11561 922 Korea Telecom (KIX)
17974 2541 855 91 PT TELEKOMUNIKASI INDONESIA
7545 1999 320 108 TPG Internet Pty Ltd
4755 1743 391 191 TATA Communications formerly
9829 1517 1205 40 BSNL National Internet Backbo
9583 1221 91 503 Sify Limited
7552 1162 1080 13 Vietel Corporation
4808 1143 2124 334 CNCGROUP IP network: China169
9498 1128 309 70 BHARTI Airtel Ltd.
24560 1077 394 164 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 3012 3691 75 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
1785 1992 677 124 PaeTec Communications, Inc.
22773 1984 2927 122 Cox Communications, Inc.
20115 1663 1616 616 Charter Communications
4323 1623 1138 405 Time Warner Telecom
701 1535 11143 800 UUNET Technologies, Inc.
30036 1327 297 643 Mediacom Communications Corp
7018 1297 11039 832 AT&T WorldNet Services
11492 1218 216 359 Cable One

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 1719 544 16 Corbina telecom
34984 1276 244 222 BILISIM TELEKOM
2118 1069 97 13 EUnet/RELCOM Autonomous Syste
20940 892 312 696 Akamai Technologies European
13188 825 98 79 Educational Network
31148 819 41 26 FreeNet ISP
8551 773 370 44 Bezeq International
6830 766 2376 440 UPC Distribution Services
12479 678 786 59 Uni2 Autonomous System
34744 676 173 59 SC GVM SISTEM 2003 SRL

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 2812 1557 111 NET Servicos de Comunicao S.A
10620 2651 417 219 TVCABLE BOGOTA
7303 1731 1155 220 Telecom Argentina Stet-France
8151 1283 2721 401 UniNet S.A. de C.V.
18881 994 844 20 Global Village Telecom
6503 865 434 65 AVANTEL, S.A.
27947 841 89 107 Telconet S.A
3816 714 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
11172 608 87 64 Servicios Alestra S.A de C.V

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 1237 80 4 MOBITEL
24863 885 274 31 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 452 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 261 922 219 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
29571 205 17 9 Ci Telecom Autonomous system
12258 192 28 66 Vodacom Internet Company
29975 191 667 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
6389 3012 3691 75 bellsouth.net, inc.
4766 2948 11561 922 Korea Telecom (KIX)
28573 2812 1557 111 NET Servicos de Comunicao S.A
10620 2651 417 219 TVCABLE BOGOTA
17974 2541 855 91 PT TELEKOMUNIKASI INDONESIA
18566 2065 382 184 Covad Communications
7545 1999 320 108 TPG Internet Pty Ltd
1785 1992 677 124 PaeTec Communications, Inc.
22773 1984 2927 122 Cox Communications, Inc.
4755 1743 391 191 TATA Communications formerly

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
28573 2812 2701 NET Servicos de Comunicao S.A
17974 2541 2450 PT TELEKOMUNIKASI INDONESIA
10620 2651 2432 TVCABLE BOGOTA
4766 2948 2026 Korea Telecom (KIX)
7545 1999 1891 TPG Internet Pty Ltd
18566 2065 1881 Covad Communications
1785 1992 1868 PaeTec Communications, Inc.
22773 1984 1862 Cox Communications, Inc.
8402 1719 1703 Corbina telecom
4755 1743 1552 TATA Communications formerly

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 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
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
26064 UNALLOCATED 12.149.37.0/24 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
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.46.0/23 39743 Mobimax Telecom SRL
128.0.53.0/24 60993 Totalsoft SA
128.0.54.0/24 60972 Carpatair SA
128.0.55.0/24 48571 SC efectRO SRL
128.0.57.0/24 60993 Totalsoft SA
128.0.58.0/23 9050 RTD-ROMTELECOM Autonomous Sys
128.0.60.0/24 9050 RTD-ROMTELECOM Autonomous Sys

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.
64.185.230.0/24 27431 JTL Networks Inc.
64.185.231.0/24 27431 JTL Networks Inc.

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 /8:17 /9:11 /10:30 /11:91 /12:250
/13:484 /14:902 /15:1605 /16:12715 /17:6658 /18:11168
/19:22195 /20:32078 /21:34411 /22:47711 /23:42252 /24:238799
/25:1305 /26:1643 /27:852 /28:46 /29:65 /30:18
/31:0 /32:18

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
6389 1731 3012 bellsouth.net, inc.
8402 1415 1719 Corbina telecom
22773 1292 1984 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1196 1327 Mediacom Communications Corp
11492 1180 1218 Cable One
1785 1062 1992 PaeTec Communications, Inc.
6983 1011 1138 ITC^Deltacom
10620 990 2651 TVCABLE BOGOTA

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

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

1:829 2:842 3:3 4:19 5:790 6:12
8:556 12:1923 13:3 14:834 15:11 16:3
17:10 20:17 23:370 24:1766 27:1477 31:1248
32:43 33:2 34:5 36:40 37:1857 38:874
39:2 40:170 41:2728 42:195 44:6 46:1840
47:2 49:663 50:733 52:12 54:35 55:7
57:26 58:1151 59:573 60:315 61:1406 62:1124
63:2026 64:4316 65:2163 66:4179 67:2056 68:1081
69:3263 70:786 71:488 72:1918 74:2477 75:323
76:302 77:1137 78:1007 79:613 80:1268 81:1005
82:625 83:577 84:541 85:1158 86:452 87:996
88:538 89:1751 90:147 91:5525 92:603 93:1679
94:1866 95:1635 96:513 97:345 98:1001 99:42
100:30 101:328 103:2767 105:517 106:146 107:208
108:513 109:1822 110:903 111:1050 112:544 113:813
114:693 115:964 116:963 117:803 118:1093 119:1315
120:410 121:731 122:1796 123:1219 124:1363 125:1377
128:637 129:223 130:326 131:662 132:346 133:148
134:267 135:67 136:222 137:242 138:358 139:195
140:212 141:331 142:540 143:389 144:502 145:93
146:509 147:388 148:686 149:369 150:160 151:506
152:419 153:187 154:42 155:406 156:268 157:396
158:279 159:731 160:343 161:445 162:417 163:221
164:542 165:497 166:273 167:597 168:1026 169:130
170:1052 171:181 172:21 173:1587 174:544 175:469
176:982 177:2064 178:1869 179:29 180:1462 181:433
182:1229 183:387 184:692 185:540 186:2283 187:1307
188:2107 189:1258 190:6538 192:6723 193:5671 194:4598
195:3430 196:1354 197:918 198:4488 199:5334 200:5981
201:2189 202:8820 203:8905 204:4509 205:2570 206:2792
207:2848 208:4047 209:3617 210:2961 211:1508 212:2188
213:1973 214:931 215:98 216:5237 217:1621 218:619
219:334 220:1281 221:557 222:322 223:452

End of report
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