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, May 8, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 09 May, 2013

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

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

BGP routing table entries examined: 453779
Prefixes after maximum aggregation: 185138
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 224174
Total ASes present in the Internet Routing Table: 44030
Prefixes per ASN: 10.31
Origin-only ASes present in the Internet Routing Table: 34567
Origin ASes announcing only one prefix: 16104
Transit ASes present in the Internet Routing Table: 5839
Transit-only ASes present in the Internet Routing Table: 152
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 19037) 22
Prefixes from unregistered ASNs in the Routing Table: 318
Unregistered ASNs in the Routing Table: 134
Number of 32-bit ASNs allocated by the RIRs: 4757
Number of 32-bit ASNs visible in the Routing Table: 3624
Prefixes from 32-bit ASNs in the Routing Table: 10285
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 235
Number of addresses announced to Internet: 2615907564
Equivalent to 155 /8s, 235 /16s and 148 /24s
Percentage of available address space announced: 70.7
Percentage of allocated address space announced: 70.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.5
Total number of prefixes smaller than registry allocations: 160099

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

Prefixes being announced by APNIC Region ASes: 108769
Total APNIC prefixes after maximum aggregation: 33411
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 110096
Unique aggregates announced from the APNIC address blocks: 44877
APNIC Region origin ASes present in the Internet Routing Table: 4838
APNIC Prefixes per ASN: 22.76
APNIC Region origin ASes announcing only one prefix: 1226
APNIC Region transit ASes present in the Internet Routing Table: 824
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 30
Number of APNIC region 32-bit ASNs visible in the Routing Table: 522
Number of APNIC addresses announced to Internet: 720979680
Equivalent to 42 /8s, 249 /16s and 70 /24s
Percentage of available APNIC address space announced: 84.3

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: 159247
Total ARIN prefixes after maximum aggregation: 80125
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 159848
Unique aggregates announced from the ARIN address blocks: 73306
ARIN Region origin ASes present in the Internet Routing Table: 15677
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5968
ARIN Region transit ASes present in the Internet Routing Table: 1630
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: 1063281024
Equivalent to 63 /8s, 96 /16s and 97 /24s
Percentage of available ARIN address space announced: 56.2

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, 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: 116998
Total RIPE prefixes after maximum aggregation: 59715
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120537
Unique aggregates announced from the RIPE address blocks: 77695
RIPE Region origin ASes present in the Internet Routing Table: 17165
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8154
RIPE Region transit ASes present in the Internet Routing Table: 2803
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: 2316
Number of RIPE addresses announced to Internet: 656438628
Equivalent to 39 /8s, 32 /16s and 117 /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: 47576
Total LACNIC prefixes after maximum aggregation: 9338
LACNIC Deaggregation factor: 5.09
Prefixes being announced from the LACNIC address blocks: 51677
Unique aggregates announced from the LACNIC address blocks: 24215
LACNIC Region origin ASes present in the Internet Routing Table: 1917
LACNIC Prefixes per ASN: 26.96
LACNIC Region origin ASes announcing only one prefix: 568
LACNIC Region transit ASes present in the Internet Routing Table: 356
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: 761
Number of LACNIC addresses announced to Internet: 128441384
Equivalent to 7 /8s, 167 /16s and 220 /24s
Percentage of available LACNIC address space announced: 76.6

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: 10818
Total AfriNIC prefixes after maximum aggregation: 2509
AfriNIC Deaggregation factor: 4.31
Prefixes being announced from the AfriNIC address blocks: 11386
Unique aggregates announced from the AfriNIC address blocks: 3863
AfriNIC Region origin ASes present in the Internet Routing Table: 630
AfriNIC Prefixes per ASN: 18.07
AfriNIC Region origin ASes announcing only one prefix: 188
AfriNIC Region transit ASes present in the Internet Routing Table: 135
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 18
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46382592
Equivalent to 2 /8s, 195 /16s and 190 /24s
Percentage of available AfriNIC address space announced: 46.1

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 2958 11558 925 Korea Telecom (KIX)
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1903 320 109 TPG Internet Pty Ltd
4755 1727 390 191 TATA Communications formerly
9829 1503 1205 40 BSNL National Internet Backbo
9583 1217 91 500 Sify Limited
7552 1172 1064 12 Vietel Corporation
4808 1120 2113 328 CNCGROUP IP network: China169
9498 1100 310 73 BHARTI Airtel Ltd.
24560 1070 393 167 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 3016 3693 82 bellsouth.net, inc.
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1993 677 125 PaeTec Communications, Inc.
22773 1972 2929 125 Cox Communications, Inc.
20115 1670 1610 614 Charter Communications
4323 1608 1139 398 Time Warner Telecom
30036 1336 297 652 Mediacom Communications Corp
7018 1315 10759 852 AT&T WorldNet Services
11492 1244 228 326 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 1760 544 16 Corbina telecom
2118 1390 97 13 EUnet/RELCOM Autonomous Syste
34984 1183 237 220 BILISIM TELEKOM
13188 834 99 64 Educational Network
20940 827 287 654 Akamai Technologies European
31148 790 39 20 FreeNet ISP
8551 773 370 43 Bezeq International
6830 771 2376 444 UPC Distribution Services
12479 680 782 67 Uni2 Autonomous System
34744 670 172 54 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 2687 1472 107 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
7303 1689 1157 219 Telecom Argentina Stet-France
8151 1241 2701 392 UniNet S.A. de C.V.
6503 945 435 68 AVANTEL, S.A.
18881 919 780 19 Global Village Telecom
27947 824 88 95 Telconet S.A
11830 710 364 14 Instituto Costarricense de El
7738 698 1370 35 Telecomunicacoes da Bahia S.A
3816 697 306 85 Empresa Nacional de Telecomun

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 888 274 32 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 459 956 9 TEDATA
24835 333 80 8 RAYA Telecom - Egypt
3741 261 906 220 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
36992 189 527 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 3016 3693 82 bellsouth.net, inc.
4766 2958 11558 925 Korea Telecom (KIX)
28573 2687 1472 107 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1993 677 125 PaeTec Communications, Inc.
22773 1972 2929 125 Cox Communications, Inc.
7545 1903 320 109 TPG Internet Pty Ltd

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 2687 2580 NET Servicos de Comunicao S.A
17974 2512 2422 PT TELEKOMUNIKASI INDONESIA
10620 2624 2400 TVCABLE BOGOTA
4766 2958 2033 Korea Telecom (KIX)
7029 2140 1929 Windstream Communications Inc
18566 2067 1883 Covad Communications
1785 1993 1868 PaeTec Communications, Inc.
22773 1972 1847 Cox Communications, Inc.
7545 1903 1794 TPG Internet Pty Ltd
8402 1760 1744 Corbina telecom

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
128.0.52.0/24 60906 NETOPIA SRL
128.0.58.0/23 9050 RTD-ROMTELECOM Autonomous Sys
128.0.60.0/24 9050 RTD-ROMTELECOM Autonomous Sys
128.0.61.0/24 9050 RTD-ROMTELECOM Autonomous Sys
128.0.62.0/24 9050 RTD-ROMTELECOM Autonomous Sys
128.0.63.0/24 9050 RTD-ROMTELECOM Autonomous Sys
128.0.72.0/21 23456 32-bit ASN transition

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 /8:16 /9:13 /10:29 /11:87 /12:250
/13:490 /14:887 /15:1568 /16:12679 /17:6633 /18:11162
/19:22046 /20:31989 /21:34083 /22:47296 /23:42126 /24:238284
/25:1370 /26:1757 /27:868 /28:43 /29:66 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2018 2067 Covad Communications
6389 1728 3016 bellsouth.net, inc.
7029 1606 2140 Windstream Communications Inc
8402 1464 1760 Corbina telecom
22773 1282 1972 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1209 1336 Mediacom Communications Corp
11492 1203 1244 Cable One
1785 1062 1993 PaeTec Communications, Inc.
6983 1007 1133 ITC^Deltacom

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

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

1:798 2:751 3:3 4:15 5:879 6:7
8:555 12:1924 13:3 14:777 15:11 16:3
17:9 20:17 23:274 24:1768 27:1503 31:1264
32:43 33:2 34:5 36:44 37:1851 38:872
39:2 40:172 41:2793 42:190 44:6 46:1896
47:2 49:631 50:690 52:12 54:34 55:10
57:26 58:1139 59:569 60:306 61:1388 62:1056
63:2035 64:4318 65:2170 66:4323 67:2043 68:1129
69:3273 70:874 71:535 72:1944 74:2552 75:413
76:291 77:1100 78:1054 79:583 80:1261 81:993
82:626 83:557 84:527 85:1150 86:462 87:979
88:542 89:1785 90:161 91:5437 92:615 93:1722
94:1857 95:1528 96:525 97:343 98:1050 99:41
100:30 101:321 103:2546 105:535 106:144 107:209
108:520 109:1849 110:871 111:1055 112:512 113:787
114:708 115:941 116:897 117:792 118:1058 119:1267
120:403 121:720 122:1768 123:1241 124:1351 125:1339
128:632 129:223 130:323 131:636 132:340 133:149
134:256 135:66 136:221 137:256 138:346 139:196
140:204 141:328 142:547 143:406 144:488 145:92
146:495 147:399 148:690 149:370 150:158 151:567
152:415 153:196 154:44 155:396 156:265 157:402
158:275 159:730 160:358 161:430 162:418 163:211
164:592 165:451 166:301 167:581 168:1032 169:134
170:1027 171:178 172:6 173:1664 174:584 175:467
176:1288 177:1946 178:1840 179:5 180:1409 181:419
182:1167 183:390 184:674 185:427 186:2306 187:1306
188:2054 189:1312 190:6312 192:6595 193:5854 194:4668
195:3454 196:1343 197:904 198:4426 199:5290 200:5911
201:2399 202:8848 203:8826 204:4519 205:2562 206:2844
207:2880 208:4051 209:3623 210:2945 211:1553 212:2108
213:1916 214:917 215:98 216:5246 217:1594 218:618
219:332 220:1281 221:555 222:319 223:443

End of report
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