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, June 26, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 27 Jun, 2013

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

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

BGP routing table entries examined: 456764
Prefixes after maximum aggregation: 186050
Deaggregation factor: 2.46
Unique aggregates announced to Internet: 226977
Total ASes present in the Internet Routing Table: 44380
Prefixes per ASN: 10.29
Origin-only ASes present in the Internet Routing Table: 34745
Origin ASes announcing only one prefix: 16162
Transit ASes present in the Internet Routing Table: 5888
Transit-only ASes present in the Internet Routing Table: 147
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1636
Unregistered ASNs in the Routing Table: 751
Number of 32-bit ASNs allocated by the RIRs: 4823
Number of 32-bit ASNs visible in the Routing Table: 3747
Prefixes from 32-bit ASNs in the Routing Table: 10955
Special use prefixes present in the Routing Table: 24
Prefixes being announced from unallocated address space: 219
Number of addresses announced to Internet: 2642799148
Equivalent to 157 /8s, 133 /16s and 234 /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: 94.7
Total number of prefixes smaller than registry allocations: 159970

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

Prefixes being announced by APNIC Region ASes: 109800
Total APNIC prefixes after maximum aggregation: 33670
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 111619
Unique aggregates announced from the APNIC address blocks: 45659
APNIC Region origin ASes present in the Internet Routing Table: 4855
APNIC Prefixes per ASN: 22.99
APNIC Region origin ASes announcing only one prefix: 1222
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: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 587
Number of APNIC addresses announced to Internet: 725482720
Equivalent to 43 /8s, 61 /16s and 252 /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: 158774
Total ARIN prefixes after maximum aggregation: 80344
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159413
Unique aggregates announced from the ARIN address blocks: 74093
ARIN Region origin ASes present in the Internet Routing Table: 15757
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 6006
ARIN Region transit ASes present in the Internet Routing Table: 1644
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: 1081648448
Equivalent to 64 /8s, 120 /16s and 165 /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: 117536
Total RIPE prefixes after maximum aggregation: 60126
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 120894
Unique aggregates announced from the RIPE address blocks: 78343
RIPE Region origin ASes present in the Internet Routing Table: 17242
RIPE Prefixes per ASN: 7.01
RIPE Region origin ASes announcing only one prefix: 8170
RIPE Region transit ASes present in the Internet Routing Table: 2835
Average RIPE Region AS path length visible: 4.9
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2367
Number of RIPE addresses announced to Internet: 656561508
Equivalent to 39 /8s, 34 /16s and 85 /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: 48541
Total LACNIC prefixes after maximum aggregation: 9354
LACNIC Deaggregation factor: 5.19
Prefixes being announced from the LACNIC address blocks: 52923
Unique aggregates announced from the LACNIC address blocks: 24702
LACNIC Region origin ASes present in the Internet Routing Table: 1964
LACNIC Prefixes per ASN: 26.95
LACNIC Region origin ASes announcing only one prefix: 578
LACNIC Region transit ASes present in the Internet Routing Table: 361
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: 768
Number of LACNIC addresses announced to Internet: 132552872
Equivalent to 7 /8s, 230 /16s and 152 /24s
Percentage of available LACNIC address space announced: 79.0

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: 11068
Total AfriNIC prefixes after maximum aggregation: 2515
AfriNIC Deaggregation factor: 4.40
Prefixes being announced from the AfriNIC address blocks: 11696
Unique aggregates announced from the AfriNIC address blocks: 3981
AfriNIC Region origin ASes present in the Internet Routing Table: 640
AfriNIC Prefixes per ASN: 18.27
AfriNIC Region origin ASes announcing only one prefix: 186
AfriNIC Region transit ASes present in the Internet Routing Table: 134
Average AfriNIC Region AS path length visible: 4.9
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: 46256384
Equivalent to 2 /8s, 193 /16s and 209 /24s
Percentage of available AfriNIC address space announced: 46.0

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 2945 11561 922 Korea Telecom (KIX)
17974 2561 855 91 PT TELEKOMUNIKASI INDONESIA
7545 2011 320 109 TPG Internet Pty Ltd
4755 1748 391 191 TATA Communications formerly
9829 1519 1205 40 BSNL National Internet Backbo
9583 1291 98 536 Sify Limited
7552 1149 1080 13 Vietel Corporation
4808 1147 2124 334 CNCGROUP IP network: China169
9498 1139 309 71 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 2996 3691 72 bellsouth.net, inc.
18566 2064 382 184 Covad Communications
1785 1995 678 126 PaeTec Communications, Inc.
22773 1984 2927 123 Cox Communications, Inc.
20115 1664 1617 617 Charter Communications
4323 1623 1138 403 Time Warner Telecom
701 1534 11143 801 UUNET Technologies, Inc.
30036 1341 302 643 Mediacom Communications Corp
7018 1300 11039 829 AT&T WorldNet Services
11492 1221 217 360 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 1708 544 16 Corbina telecom
34984 1284 244 221 BILISIM TELEKOM
2118 1085 97 13 EUnet/RELCOM Autonomous Syste
20940 904 317 709 Akamai Technologies European
13188 825 98 79 Educational Network
31148 806 40 25 FreeNet ISP
8551 776 370 44 Bezeq International
6830 766 2376 440 UPC Distribution Services
12479 684 789 57 Uni2 Autonomous System
34744 658 171 76 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 2842 1559 107 NET Servicos de Comunicao S.A
10620 2674 420 199 TVCABLE BOGOTA
7303 1732 1155 221 Telecom Argentina Stet-France
8151 1260 2721 387 UniNet S.A. de C.V.
18881 1007 844 20 Global Village Telecom
6503 864 434 64 AVANTEL, S.A.
27947 821 94 93 Telconet S.A
3816 717 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
6147 663 374 25 Telefonica Del Peru

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 884 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 473 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 259 922 218 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
37054 211 11 5 Data Telecom Service
29571 208 17 12 Ci Telecom Autonomous system
36992 201 527 21 Etisalat MISR

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 2996 3691 72 bellsouth.net, inc.
4766 2945 11561 922 Korea Telecom (KIX)
28573 2842 1559 107 NET Servicos de Comunicao S.A
10620 2674 420 199 TVCABLE BOGOTA
17974 2561 855 91 PT TELEKOMUNIKASI INDONESIA
18566 2064 382 184 Covad Communications
7545 2011 320 109 TPG Internet Pty Ltd
1785 1995 678 126 PaeTec Communications, Inc.
22773 1984 2927 123 Cox Communications, Inc.
4755 1748 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 2842 2735 NET Servicos de Comunicao S.A
10620 2674 2475 TVCABLE BOGOTA
17974 2561 2470 PT TELEKOMUNIKASI INDONESIA
4766 2945 2023 Korea Telecom (KIX)
7545 2011 1902 TPG Internet Pty Ltd
18566 2064 1880 Covad Communications
1785 1995 1869 PaeTec Communications, Inc.
22773 1984 1861 Cox Communications, Inc.
8402 1708 1692 Corbina telecom
4755 1748 1557 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
/13:483 /14:898 /15:1601 /16:12703 /17:6633 /18:11104
/19:22415 /20:32044 /21:34472 /22:47977 /23:42299 /24:239799
/25:1299 /26:1641 /27:851 /28:46 /29:65 /30:19
/31:0 /32:16

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

ASN No of nets Total ann. Description
18566 2015 2064 Covad Communications
6389 1720 2996 bellsouth.net, inc.
8402 1403 1708 Corbina telecom
22773 1291 1984 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1208 1341 Mediacom Communications Corp
11492 1183 1221 Cable One
1785 1063 1995 PaeTec Communications, Inc.
6983 1011 1141 ITC^Deltacom
10620 994 2674 TVCABLE BOGOTA

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

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

1:839 2:825 3:3 4:19 5:807 6:15
8:561 12:1922 13:3 14:855 15:11 16:3
17:10 20:17 23:280 24:1768 27:1497 31:1251
32:43 33:2 34:5 36:47 37:1869 38:877
39:2 40:170 41:2816 42:202 44:8 46:1908
47:2 49:659 50:741 52:12 54:35 55:6
57:26 58:1160 59:576 60:323 61:1411 62:1120
63:2028 64:4326 65:2156 66:4174 67:2045 68:1078
69:3272 70:832 71:496 72:1911 74:2463 75:323
76:301 77:1110 78:1068 79:625 80:1268 81:1007
82:623 83:586 84:548 85:1172 86:437 87:1011
88:538 89:1743 90:148 91:5517 92:609 93:1739
94:1873 95:1667 96:514 97:346 98:1012 99:40
100:30 101:330 103:2859 105:519 106:142 107:207
108:511 109:1836 110:905 111:1062 112:549 113:819
114:698 115:969 116:961 117:799 118:1106 119:1320
120:389 121:732 122:1798 123:1223 124:1375 125:1378
128:638 129:224 130:307 131:662 132:360 133:155
134:266 135:68 136:223 137:242 138:340 139:192
140:210 141:328 142:535 143:373 144:497 145:94
146:502 147:382 148:669 149:349 150:157 151:521
152:420 153:189 154:23 155:417 156:269 157:396
158:279 159:717 160:344 161:451 162:467 163:223
164:603 165:498 166:244 167:597 168:1046 169:129
170:1051 171:180 172:21 173:1585 174:545 175:474
176:993 177:2109 178:1852 179:46 180:1462 181:470
182:1239 183:387 184:663 185:560 186:2264 187:1280
188:2057 189:1274 190:6800 192:6766 193:5677 194:4611
195:3457 196:1374 197:969 198:4497 199:5345 200:5982
201:2205 202:8811 203:8895 204:4512 205:2571 206:2788
207:2845 208:4041 209:3631 210:2940 211:1517 212:2176
213:1968 214:925 215:99 216:5246 217:1625 218:620
219:334 220:1282 221:557 222:325 223:461

End of report
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