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.

Tuesday, April 16, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 17 Apr, 2013

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

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

BGP routing table entries examined: 450205
Prefixes after maximum aggregation: 184482
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 222163
Total ASes present in the Internet Routing Table: 43855
Prefixes per ASN: 10.27
Origin-only ASes present in the Internet Routing Table: 34485
Origin ASes announcing only one prefix: 16067
Transit ASes present in the Internet Routing Table: 5793
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 19037) 22
Prefixes from unregistered ASNs in the Routing Table: 378
Unregistered ASNs in the Routing Table: 142
Number of 32-bit ASNs allocated by the RIRs: 4727
Number of 32-bit ASNs visible in the Routing Table: 3577
Prefixes from 32-bit ASNs in the Routing Table: 10168
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 220
Number of addresses announced to Internet: 2613510476
Equivalent to 155 /8s, 199 /16s and 1 /24s
Percentage of available address space announced: 70.6
Percentage of allocated address space announced: 70.6
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: 158686

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

Prefixes being announced by APNIC Region ASes: 108257
Total APNIC prefixes after maximum aggregation: 33387
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 109478
Unique aggregates announced from the APNIC address blocks: 44489
APNIC Region origin ASes present in the Internet Routing Table: 4821
APNIC Prefixes per ASN: 22.71
APNIC Region origin ASes announcing only one prefix: 1219
APNIC Region transit ASes present in the Internet Routing Table: 816
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 502
Number of APNIC addresses announced to Internet: 720726464
Equivalent to 42 /8s, 245 /16s and 105 /24s
Percentage of available APNIC address space announced: 84.2

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: 158122
Total ARIN prefixes after maximum aggregation: 79719
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 158771
Unique aggregates announced from the ARIN address blocks: 72574
ARIN Region origin ASes present in the Internet Routing Table: 15639
ARIN Prefixes per ASN: 10.15
ARIN Region origin ASes announcing only one prefix: 5945
ARIN Region transit ASes present in the Internet Routing Table: 1617
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: 1062796160
Equivalent to 63 /8s, 88 /16s and 251 /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: 116527
Total RIPE prefixes after maximum aggregation: 59429
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120099
Unique aggregates announced from the RIPE address blocks: 76907
RIPE Region origin ASes present in the Internet Routing Table: 17136
RIPE Prefixes per ASN: 7.01
RIPE Region origin ASes announcing only one prefix: 8153
RIPE Region transit ASes present in the Internet Routing Table: 2790
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: 2298
Number of RIPE addresses announced to Internet: 656506340
Equivalent to 39 /8s, 33 /16s and 125 /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: 46920
Total LACNIC prefixes after maximum aggregation: 9402
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 50972
Unique aggregates announced from the LACNIC address blocks: 24138
LACNIC Region origin ASes present in the Internet Routing Table: 1898
LACNIC Prefixes per ASN: 26.86
LACNIC Region origin ASes announcing only one prefix: 560
LACNIC Region transit ASes present in the Internet Routing Table: 353
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 752
Number of LACNIC addresses announced to Internet: 126865192
Equivalent to 7 /8s, 143 /16s and 207 /24s
Percentage of available LACNIC address space announced: 75.6

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: 10071
Total AfriNIC prefixes after maximum aggregation: 2497
AfriNIC Deaggregation factor: 4.03
Prefixes being announced from the AfriNIC address blocks: 10665
Unique aggregates announced from the AfriNIC address blocks: 3854
AfriNIC Region origin ASes present in the Internet Routing Table: 616
AfriNIC Prefixes per ASN: 17.31
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 7
Number of AfriNIC addresses announced to Internet: 46173440
Equivalent to 2 /8s, 192 /16s and 141 /24s
Percentage of available AfriNIC address space announced: 45.9

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 2956 11557 923 Korea Telecom (KIX)
17974 2512 839 89 PT TELEKOMUNIKASI INDONESIA
7545 1886 320 109 TPG Internet Pty Ltd
4755 1734 392 198 TATA Communications formerly
9829 1511 1205 40 BSNL National Internet Backbo
9583 1284 98 538 Sify Limited
7552 1167 1066 12 Vietel Corporation
4808 1121 2109 325 CNCGROUP IP network: China169
9498 1076 310 74 BHARTI Airtel Ltd.
24560 1068 385 164 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 3036 3694 87 bellsouth.net, inc.
7029 2173 1265 212 Windstream Communications Inc
18566 2068 382 184 Covad Communications
22773 2016 2929 125 Cox Communications, Inc.
1785 1974 677 122 PaeTec Communications, Inc.
20115 1668 1611 611 Charter Communications
4323 1609 1139 398 Time Warner Telecom
30036 1342 296 657 Mediacom Communications Corp
7018 1315 10807 854 AT&T WorldNet Services
11492 1238 228 334 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 1839 544 16 Corbina telecom
2118 1430 97 13 EUnet/RELCOM Autonomous Syste
34984 1150 235 207 BILISIM TELEKOM
12479 845 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 824 288 656 Akamai Technologies European
31148 794 41 22 FreeNet ISP
6830 754 2318 441 UPC Distribution Services
8551 735 369 50 Bezeq International
58113 666 74 386 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 2629 1451 100 NET Servicos de Comunicao S.A
10620 2365 409 219 TVCABLE BOGOTA
7303 1676 1153 211 Telecom Argentina Stet-France
8151 1234 2688 396 UniNet S.A. de C.V.
6503 1110 435 68 AVANTEL, S.A.
18881 855 716 18 Global Village Telecom
27947 809 88 97 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 696 306 85 Empresa Nacional de Telecomun
7738 650 1306 35 Telecomunicacoes da Bahia S.A

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 693 274 33 LINKdotNET AS number
6713 543 617 25 Itissalat Al-MAGHRIB
8452 360 956 9 TEDATA
24835 275 80 8 RAYA Telecom - Egypt
3741 261 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 186 697 91 MTN Network Solutions
33776 180 12 20 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 3036 3694 87 bellsouth.net, inc.
4766 2956 11557 923 Korea Telecom (KIX)
28573 2629 1451 100 NET Servicos de Comunicao S.A
17974 2512 839 89 PT TELEKOMUNIKASI INDONESIA
10620 2365 409 219 TVCABLE BOGOTA
7029 2173 1265 212 Windstream Communications Inc
18566 2068 382 184 Covad Communications
22773 2016 2929 125 Cox Communications, Inc.
1785 1974 677 122 PaeTec Communications, Inc.
7545 1886 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 2629 2529 NET Servicos de Comunicao S.A
17974 2512 2423 PT TELEKOMUNIKASI INDONESIA
10620 2365 2146 TVCABLE BOGOTA
4766 2956 2033 Korea Telecom (KIX)
7029 2173 1961 Windstream Communications Inc
22773 2016 1891 Cox Communications, Inc.
18566 2068 1884 Covad Communications
1785 1974 1852 PaeTec Communications, Inc.
8402 1839 1823 Corbina telecom
7545 1886 1777 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
128.0.55.0/24 48571 SC efectRO 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
41.222.80.0/21 37110 Moztel LDA
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.

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 /11:88 /12:249
/13:485 /14:880 /15:1557 /16:12691 /17:6608 /18:10907
/19:21820 /20:31932 /21:33784 /22:46723 /23:41730 /24:236518
/25:1391 /26:1768 /27:861 /28:45 /29:70 /30:21
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2019 2068 Covad Communications
6389 1741 3036 bellsouth.net, inc.
7029 1612 2173 Windstream Communications Inc
8402 1539 1839 Corbina telecom
22773 1320 2016 Cox Communications, Inc.
30036 1217 1342 Mediacom Communications Corp
11492 1197 1238 Cable One
36998 1131 1137 MOBITEL
1785 1047 1974 PaeTec Communications, Inc.
6983 1006 1134 ITC^Deltacom

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

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

1:772 2:791 3:3 4:15 5:861 6:5
8:542 12:1917 13:3 14:769 15:11 16:3
17:9 20:18 23:267 24:1775 27:1459 31:1201
32:43 33:2 34:5 36:43 37:1822 38:861
39:2 40:169 41:2627 42:186 44:6 46:1792
47:2 49:621 50:674 52:12 54:30 55:8
57:27 58:1141 59:589 60:307 61:1451 62:1037
63:2044 64:4308 65:2187 66:4320 67:2072 68:1127
69:3247 70:874 71:532 72:1922 74:2571 75:411
76:294 77:1100 78:1058 79:582 80:1235 81:980
82:615 83:575 84:526 85:1167 86:462 87:958
88:528 89:1800 90:281 91:5493 92:620 93:1708
94:1855 95:1683 96:519 97:341 98:1053 99:41
100:29 101:312 103:2455 105:488 106:136 107:207
108:515 109:1809 110:850 111:1049 112:503 113:781
114:691 115:1013 116:876 117:781 118:1015 119:1263
120:390 121:819 122:1735 123:1191 124:1334 125:1330
128:636 129:223 130:322 131:658 132:339 133:149
134:260 135:62 136:223 137:250 138:343 139:187
140:199 141:317 142:544 143:372 144:488 145:91
146:502 147:385 148:698 149:367 150:165 151:527
152:419 153:194 154:44 155:395 156:260 157:393
158:268 159:716 160:338 161:424 162:379 163:202
164:590 165:449 166:336 167:577 168:1029 169:133
170:1029 171:174 172:5 173:1603 174:586 175:448
176:1234 177:1873 178:1816 179:2 180:1406 181:382
182:1134 183:372 184:664 185:367 186:2311 187:1260
188:2010 189:1317 190:6113 192:6504 193:5831 194:4645
195:3640 196:1332 197:827 198:4331 199:5282 200:5929
201:2367 202:8842 203:8747 204:4516 205:2552 206:2812
207:2836 208:4067 209:3579 210:2938 211:1564 212:2036
213:1899 214:937 215:98 216:5197 217:1569 218:620
219:346 220:1270 221:548 222:313 223:446

End of report
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