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, January 24, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 25 Jan, 2013

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

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

BGP routing table entries examined: 439945
Prefixes after maximum aggregation: 181596
Deaggregation factor: 2.42
Unique aggregates announced to Internet: 216462
Total ASes present in the Internet Routing Table: 43108
Prefixes per ASN: 10.21
Origin-only ASes present in the Internet Routing Table: 34050
Origin ASes announcing only one prefix: 15909
Transit ASes present in the Internet Routing Table: 5750
Transit-only ASes present in the Internet Routing Table: 137
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 384
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 3692
Number of 32-bit ASNs visible in the Routing Table: 3308
Prefixes from 32-bit ASNs in the Routing Table: 9085
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 192
Number of addresses announced to Internet: 2629323052
Equivalent to 156 /8s, 184 /16s and 73 /24s
Percentage of available address space announced: 71.0
Percentage of allocated address space announced: 71.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.2
Total number of prefixes smaller than registry allocations: 155006

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

Prefixes being announced by APNIC Region ASes: 105842
Total APNIC prefixes after maximum aggregation: 33003
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 106862
Unique aggregates announced from the APNIC address blocks: 43779
APNIC Region origin ASes present in the Internet Routing Table: 4816
APNIC Prefixes per ASN: 22.19
APNIC Region origin ASes announcing only one prefix: 1243
APNIC Region transit ASes present in the Internet Routing Table: 807
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 409
Number of APNIC addresses announced to Internet: 717483936
Equivalent to 42 /8s, 195 /16s and 239 /24s
Percentage of available APNIC address space announced: 83.9

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: 155259
Total ARIN prefixes after maximum aggregation: 78622
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 155895
Unique aggregates announced from the ARIN address blocks: 70879
ARIN Region origin ASes present in the Internet Routing Table: 15413
ARIN Prefixes per ASN: 10.11
ARIN Region origin ASes announcing only one prefix: 5820
ARIN Region transit ASes present in the Internet Routing Table: 1596
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 25
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1092017024
Equivalent to 65 /8s, 22 /16s and 219 /24s
Percentage of available ARIN address space announced: 57.8

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, 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: 113294
Total RIPE prefixes after maximum aggregation: 58410
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 116361
Unique aggregates announced from the RIPE address blocks: 74455
RIPE Region origin ASes present in the Internet Routing Table: 17028
RIPE Prefixes per ASN: 6.83
RIPE Region origin ASes announcing only one prefix: 8148
RIPE Region transit ASes present in the Internet Routing Table: 2786
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2138
Number of RIPE addresses announced to Internet: 653050852
Equivalent to 38 /8s, 236 /16s and 195 /24s
Percentage of available RIPE address space announced: 94.9

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: 46240
Total LACNIC prefixes after maximum aggregation: 9102
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 49951
Unique aggregates announced from the LACNIC address blocks: 23483
LACNIC Region origin ASes present in the Internet Routing Table: 1786
LACNIC Prefixes per ASN: 27.97
LACNIC Region origin ASes announcing only one prefix: 515
LACNIC Region transit ASes present in the Internet Routing Table: 339
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 27
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 737
Number of LACNIC addresses announced to Internet: 122324776
Equivalent to 7 /8s, 74 /16s and 135 /24s
Percentage of available LACNIC address space announced: 72.9

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
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: 10091
Total AfriNIC prefixes after maximum aggregation: 2407
AfriNIC Deaggregation factor: 4.19
Prefixes being announced from the AfriNIC address blocks: 10684
Unique aggregates announced from the AfriNIC address blocks: 3695
AfriNIC Region origin ASes present in the Internet Routing Table: 590
AfriNIC Prefixes per ASN: 18.11
AfriNIC Region origin ASes announcing only one prefix: 183
AfriNIC Region transit ASes present in the Internet Routing Table: 129
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 44088832
Equivalent to 2 /8s, 160 /16s and 190 /24s
Percentage of available AfriNIC address space announced: 43.8

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 2939 11556 920 Korea Telecom (KIX)
17974 2474 829 53 PT TELEKOMUNIKASI INDONESIA
7545 1824 301 88 TPG Internet Pty Ltd
4755 1668 380 174 TATA Communications formerly
9829 1426 1152 45 BSNL National Internet Backbo
9583 1199 89 502 Sify Limited
7552 1141 1070 12 Vietel Corporation
4808 1124 2040 316 CNCGROUP IP network: China169
9498 1051 310 74 BHARTI Airtel Ltd.
24560 1040 385 160 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 3100 3700 119 bellsouth.net, inc.
7029 2285 1265 211 Windstream Communications Inc
18566 2081 382 180 Covad Communications
22773 1961 2931 128 Cox Communications, Inc.
1785 1949 678 124 PaeTec Communications, Inc.
20115 1687 1607 627 Charter Communications
4323 1598 1155 394 Time Warner Telecom
30036 1353 288 692 Mediacom Communications Corp
7018 1299 10550 861 AT&T WorldNet Services
7011 1208 321 687 Citizens Utilities

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 1918 544 16 Corbina telecom
2118 1432 97 13 EUnet/RELCOM Autonomous Syste
34984 928 231 206 BILISIM TELEKOM
13188 841 99 22 Educational Network
12479 833 778 65 Uni2 Autonomous System
31148 744 38 14 FreeNet ISP
20940 729 245 577 Akamai Technologies European
6830 713 2313 434 UPC Distribution Services
8551 712 367 39 Bezeq International
58113 633 70 378 LIR DATACENTER TELECOM 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 2309 1315 81 NET Servicos de Comunicao S.A
10620 2297 393 225 TVCABLE BOGOTA
7303 1671 1139 205 Telecom Argentina Stet-France
8151 1542 2902 371 UniNet S.A. de C.V.
6503 1453 435 67 AVANTEL, S.A.
27947 771 85 96 Telconet S.A
18881 756 716 18 Global Village Telecom
14754 722 76 161 Telgua S. A.
3816 672 306 85 Empresa Nacional de Telecomun
11172 603 86 67 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 971 80 4 MOBITEL
24863 896 275 36 LINKdotNET AS number
8452 553 958 13 TEDATA
6713 499 602 20 Itissalat Al-MAGHRIB
24835 282 80 8 RAYA Telecom - Egypt
3741 266 906 224 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 189 696 90 MTN Network Solutions

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 3100 3700 119 bellsouth.net, inc.
4766 2939 11556 920 Korea Telecom (KIX)
17974 2474 829 53 PT TELEKOMUNIKASI INDONESIA
28573 2309 1315 81 NET Servicos de Comunicao S.A
10620 2297 393 225 TVCABLE BOGOTA
7029 2285 1265 211 Windstream Communications Inc
18566 2081 382 180 Covad Communications
22773 1961 2931 128 Cox Communications, Inc.
1785 1949 678 124 PaeTec Communications, Inc.
8402 1918 544 16 Corbina telecom

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

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

ASN No of nets Net Savings Description
17974 2474 2421 PT TELEKOMUNIKASI INDONESIA
28573 2309 2228 NET Servicos de Comunicao S.A
7029 2285 2074 Windstream Communications Inc
10620 2297 2072 TVCABLE BOGOTA
4766 2939 2019 Korea Telecom (KIX)
8402 1918 1902 Corbina telecom
18566 2081 1901 Covad Communications
22773 1961 1833 Cox Communications, Inc.
1785 1949 1825 PaeTec Communications, Inc.
7545 1824 1736 TPG Internet Pty Ltd

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
128.0.24.0/21 41794 Altline LLC
128.0.60.0/23 57417 INTERNET TASMANIA SRL
128.0.62.0/23 57417 INTERNET TASMANIA SRL
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.96.0/21 12886 LEWTelNet GmbH
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan

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

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

Network Origin AS Description
27.112.114.0/24 23884 Proimage Engineering and Comm
31.210.16.0/22 15657 Neural Networks ASN
41.222.80.0/21 37110 Moztel LDA
62.12.96.0/19 38478 SunnyVision Limited
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.

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 /8:18 /9:13 /10:29 /11:88 /12:246
/13:479 /14:865 /15:1554 /16:12526 /17:6589 /18:10937
/19:21696 /20:31133 /21:33187 /22:44793 /23:40706 /24:230930
/25:1324 /26:1669 /27:866 /28:182 /29:77 /30:17
/31:0 /32:21

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

ASN No of nets Total ann. Description
18566 2031 2081 Covad Communications
6389 1770 3100 bellsouth.net, inc.
7029 1642 2285 Windstream Communications Inc
8402 1631 1918 Corbina telecom
22773 1292 1961 Cox Communications, Inc.
30036 1248 1353 Mediacom Communications Corp
11492 1157 1194 Cable One
1785 1030 1949 PaeTec Communications, Inc.
6503 980 1453 AVANTEL, S.A.
36998 965 971 MOBITEL

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

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

1:704 2:784 3:3 4:13 5:727 6:3
8:489 12:1927 13:3 14:715 15:11 16:3
17:8 20:27 23:223 24:1802 27:1484 31:1129
32:54 33:2 34:5 36:9 37:1228 38:850
39:2 40:139 41:2710 42:180 44:3 46:1737
47:1 49:533 50:666 52:12 54:28 55:2
57:28 58:1075 59:561 60:249 61:1316 62:1033
63:2045 64:4318 65:2165 66:4271 67:2010 68:1120
69:3225 70:859 71:536 72:1881 74:2544 75:425
76:294 77:1031 78:1035 79:561 80:1222 81:981
82:648 83:535 84:572 85:1163 86:473 87:970
88:366 89:1734 90:285 91:5378 92:608 93:1656
94:2013 95:1632 96:490 97:330 98:1052 99:52
100:30 101:306 103:2032 105:530 106:129 107:208
108:504 109:1741 110:849 111:999 112:471 113:750
114:677 115:926 116:889 117:784 118:965 119:1283
120:328 121:700 122:1727 123:1165 124:1322 125:1298
128:564 129:203 130:311 131:602 132:321 133:142
134:255 135:62 136:219 137:234 138:340 139:157
140:204 141:313 142:519 143:380 144:480 145:90
146:525 147:334 148:730 149:340 150:159 151:255
152:399 153:190 154:24 155:448 156:237 157:393
158:258 159:702 160:334 161:420 162:365 163:202
164:591 165:460 166:457 167:573 168:1005 169:131
170:1004 171:163 172:4 173:1554 174:757 175:426
176:1018 177:1621 178:1689 180:1377 181:213 182:1163
183:314 184:634 185:180 186:2231 187:1476 188:1900
189:1552 190:6499 192:6165 193:5842 194:4668 195:3658
196:1263 197:515 198:4076 199:5178 200:6013 201:2153
202:8765 203:8744 204:4462 205:2550 206:2800 207:2788
208:4062 209:3520 210:2906 211:1563 212:2002 213:1872
214:920 215:91 216:5048 217:1573 218:596 219:325
220:1269 221:524 222:333 223:412

End of report
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