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, March 28, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 29 Mar, 2013

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

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

BGP routing table entries examined: 447465
Prefixes after maximum aggregation: 183568
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 220753
Total ASes present in the Internet Routing Table: 43645
Prefixes per ASN: 10.25
Origin-only ASes present in the Internet Routing Table: 34343
Origin ASes announcing only one prefix: 16013
Transit ASes present in the Internet Routing Table: 5795
Transit-only ASes present in the Internet Routing Table: 143
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: 385
Unregistered ASNs in the Routing Table: 138
Number of 32-bit ASNs allocated by the RIRs: 4660
Number of 32-bit ASNs visible in the Routing Table: 3507
Prefixes from 32-bit ASNs in the Routing Table: 10205
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 210
Number of addresses announced to Internet: 2623998308
Equivalent to 156 /8s, 103 /16s and 9 /24s
Percentage of available address space announced: 70.9
Percentage of allocated address space announced: 70.9
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.4
Total number of prefixes smaller than registry allocations: 158183

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

Prefixes being announced by APNIC Region ASes: 107598
Total APNIC prefixes after maximum aggregation: 33180
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108783
Unique aggregates announced from the APNIC address blocks: 44215
APNIC Region origin ASes present in the Internet Routing Table: 4808
APNIC Prefixes per ASN: 22.63
APNIC Region origin ASes announcing only one prefix: 1224
APNIC Region transit ASes present in the Internet Routing Table: 820
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 473
Number of APNIC addresses announced to Internet: 719950656
Equivalent to 42 /8s, 233 /16s and 147 /24s
Percentage of available APNIC address space announced: 84.1

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: 157260
Total ARIN prefixes after maximum aggregation: 79282
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157938
Unique aggregates announced from the ARIN address blocks: 72195
ARIN Region origin ASes present in the Internet Routing Table: 15569
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5904
ARIN Region transit ASes present in the Internet Routing Table: 1614
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: 18
Number of ARIN addresses announced to Internet: 1079669664
Equivalent to 64 /8s, 90 /16s and 115 /24s
Percentage of available ARIN address space announced: 57.1

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: 115002
Total RIPE prefixes after maximum aggregation: 59233
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 118698
Unique aggregates announced from the RIPE address blocks: 76597
RIPE Region origin ASes present in the Internet Routing Table: 17112
RIPE Prefixes per ASN: 6.94
RIPE Region origin ASes announcing only one prefix: 8150
RIPE Region transit ASes present in the Internet Routing Table: 2798
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2257
Number of RIPE addresses announced to Internet: 654611300
Equivalent to 39 /8s, 4 /16s and 147 /24s
Percentage of available RIPE address space announced: 95.2

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: 47448
Total LACNIC prefixes after maximum aggregation: 9393
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 51449
Unique aggregates announced from the LACNIC address blocks: 23881
LACNIC Region origin ASes present in the Internet Routing Table: 1877
LACNIC Prefixes per ASN: 27.41
LACNIC Region origin ASes announcing only one prefix: 553
LACNIC Region transit ASes present in the Internet Routing Table: 349
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 30
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 753
Number of LACNIC addresses announced to Internet: 125349152
Equivalent to 7 /8s, 120 /16s and 173 /24s
Percentage of available LACNIC address space announced: 74.7

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: 9814
Total AfriNIC prefixes after maximum aggregation: 2429
AfriNIC Deaggregation factor: 4.04
Prefixes being announced from the AfriNIC address blocks: 10387
Unique aggregates announced from the AfriNIC address blocks: 3671
AfriNIC Region origin ASes present in the Internet Routing Table: 599
AfriNIC Prefixes per ASN: 17.34
AfriNIC Region origin ASes announcing only one prefix: 182
AfriNIC Region transit ASes present in the Internet Routing Table: 131
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: 44060672
Equivalent to 2 /8s, 160 /16s and 80 /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 2950 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1850 301 90 TPG Internet Pty Ltd
4755 1725 392 197 TATA Communications formerly
9829 1481 1189 43 BSNL National Internet Backbo
9583 1211 91 497 Sify Limited
7552 1179 1066 12 Vietel Corporation
4808 1119 2104 324 CNCGROUP IP network: China169
9498 1058 310 73 BHARTI Airtel Ltd.
24560 1056 385 169 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 3032 3694 87 bellsouth.net, inc.
7029 2194 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 2004 2929 125 Cox Communications, Inc.
1785 1967 677 124 PaeTec Communications, Inc.
20115 1684 1613 620 Charter Communications
4323 1612 1139 403 Time Warner Telecom
30036 1320 291 669 Mediacom Communications Corp
7018 1314 10810 851 AT&T WorldNet Services
11492 1214 223 327 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 1886 544 16 Corbina telecom
34984 1121 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 843 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 806 281 639 Akamai Technologies European
31148 782 41 20 FreeNet ISP
8551 717 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
58113 665 74 385 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 2459 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7303 1673 1152 210 Telecom Argentina Stet-France
8151 1362 2674 403 UniNet S.A. de C.V.
6503 1186 435 68 AVANTEL, S.A.
14754 941 127 87 Telgua S. A.
18881 841 716 18 Global Village Telecom
27947 803 87 94 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 692 306 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 1137 80 4 MOBITEL
24863 672 274 33 LINKdotNET AS number
6713 536 615 23 Itissalat Al-MAGHRIB
8452 337 446 12 TEDATA
24835 267 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 189 698 88 MTN Network Solutions
33776 182 12 19 Starcomms Nigeria Limited

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 3032 3694 87 bellsouth.net, inc.
4766 2950 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2459 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7029 2194 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 2004 2929 125 Cox Communications, Inc.
1785 1967 677 124 PaeTec Communications, Inc.
8402 1886 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 2508 2422 PT TELEKOMUNIKASI INDONESIA
28573 2459 2367 NET Servicos de Comunicao S.A
10620 2360 2124 TVCABLE BOGOTA
4766 2950 2028 Korea Telecom (KIX)
7029 2194 1981 Windstream Communications Inc
18566 2070 1885 Covad Communications
22773 2004 1879 Cox Communications, Inc.
8402 1886 1870 Corbina telecom
1785 1967 1843 PaeTec Communications, Inc.
7545 1850 1760 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
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
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
128.0.144.0/22 59675 mywire Datentechnik GmbH

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

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

Network Origin AS Description
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.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 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 /9:13 /10:29 /11:87 /12:248
/13:483 /14:876 /15:1560 /16:12658 /17:6613 /18:10880
/19:21734 /20:31802 /21:33531 /22:46192 /23:41526 /24:234952
/25:1381 /26:1765 /27:849 /28:176 /29:57 /30:20
/31:0 /32:16

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

ASN No of nets Total ann. Description
18566 2020 2070 Covad Communications
6389 1742 3032 bellsouth.net, inc.
7029 1597 2194 Windstream Communications Inc
8402 1579 1886 Corbina telecom
22773 1313 2004 Cox Communications, Inc.
30036 1201 1320 Mediacom Communications Corp
11492 1176 1214 Cable One
36998 1131 1137 MOBITEL
1785 1044 1967 PaeTec Communications, Inc.
7011 931 1175 Citizens Utilities

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

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

1:741 2:796 3:3 4:13 5:832 6:3
8:513 12:1919 13:3 14:762 15:11 16:3
17:8 20:19 23:247 24:1804 27:1446 31:1176
32:44 33:2 34:5 36:43 37:1702 38:862
39:2 40:160 41:2575 42:183 44:6 46:1757
47:2 49:613 50:671 52:12 54:28 55:10
57:27 58:1104 59:597 60:296 61:1452 62:978
63:2040 64:4289 65:2179 66:4285 67:2059 68:1115
69:3271 70:874 71:526 72:1898 74:2550 75:399
76:293 77:1083 78:1010 79:591 80:1253 81:977
82:606 83:576 84:557 85:1152 86:469 87:946
88:509 89:1790 90:262 91:5447 92:608 93:1693
94:1866 95:1551 96:499 97:339 98:1048 99:41
100:29 101:312 103:2322 105:488 106:135 107:207
108:514 109:1795 110:878 111:1042 112:499 113:767
114:685 115:1018 116:867 117:797 118:1004 119:1266
120:385 121:823 122:1739 123:1187 124:1325 125:1315
128:642 129:221 130:331 131:657 132:332 133:145
134:258 135:62 136:220 137:244 138:343 139:181
140:198 141:321 142:542 143:371 144:482 145:90
146:525 147:363 148:697 149:356 150:162 151:532
152:415 153:194 154:34 155:384 156:251 157:344
158:272 159:712 160:334 161:424 162:374 163:202
164:576 165:451 166:371 167:575 168:1014 169:132
170:1021 171:171 172:4 173:1575 174:580 175:435
176:1134 177:1895 178:1974 179:1 180:1386 181:298
182:1034 183:354 184:662 185:323 186:2415 187:1246
188:1907 189:1391 190:6685 192:6431 193:5681 194:4517
195:3464 196:1293 197:760 198:4276 199:5280 200:6015
201:2364 202:8868 203:8715 204:4491 205:2550 206:2791
207:2827 208:4061 209:3543 210:2923 211:1568 212:1927
213:1929 214:917 215:94 216:5194 217:1580 218:605
219:351 220:1270 221:544 222:319 223:499

End of report
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