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.

Sunday, May 5, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 06 May, 2013

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

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

BGP routing table entries examined: 453534
Prefixes after maximum aggregation: 185062
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 223633
Total ASes present in the Internet Routing Table: 43986
Prefixes per ASN: 10.31
Origin-only ASes present in the Internet Routing Table: 34555
Origin ASes announcing only one prefix: 16084
Transit ASes present in the Internet Routing Table: 5823
Transit-only ASes present in the Internet Routing Table: 146
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: 317
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 4752
Number of 32-bit ASNs visible in the Routing Table: 3608
Prefixes from 32-bit ASNs in the Routing Table: 10224
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 188
Number of addresses announced to Internet: 2616769516
Equivalent to 155 /8s, 248 /16s and 187 /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: 160158

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

Prefixes being announced by APNIC Region ASes: 108585
Total APNIC prefixes after maximum aggregation: 33444
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 109875
Unique aggregates announced from the APNIC address blocks: 44612
APNIC Region origin ASes present in the Internet Routing Table: 4832
APNIC Prefixes per ASN: 22.74
APNIC Region origin ASes announcing only one prefix: 1222
APNIC Region transit ASes present in the Internet Routing Table: 823
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: 515
Number of APNIC addresses announced to Internet: 720842208
Equivalent to 42 /8s, 247 /16s and 45 /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: 159117
Total ARIN prefixes after maximum aggregation: 80061
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 159743
Unique aggregates announced from the ARIN address blocks: 73224
ARIN Region origin ASes present in the Internet Routing Table: 15672
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5961
ARIN Region transit ASes present in the Internet Routing Table: 1624
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: 1063521920
Equivalent to 63 /8s, 100 /16s and 14 /24s
Percentage of available ARIN address space announced: 56.3

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: 116970
Total RIPE prefixes after maximum aggregation: 59692
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120485
Unique aggregates announced from the RIPE address blocks: 77581
RIPE Region origin ASes present in the Internet Routing Table: 17163
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8148
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: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2311
Number of RIPE addresses announced to Internet: 657229924
Equivalent to 39 /8s, 44 /16s and 136 /24s
Percentage of available RIPE address space announced: 95.5

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: 47743
Total LACNIC prefixes after maximum aggregation: 9324
LACNIC Deaggregation factor: 5.12
Prefixes being announced from the LACNIC address blocks: 51845
Unique aggregates announced from the LACNIC address blocks: 24199
LACNIC Region origin ASes present in the Internet Routing Table: 1916
LACNIC Prefixes per ASN: 27.06
LACNIC Region origin ASes announcing only one prefix: 567
LACNIC Region transit ASes present in the Internet Routing Table: 356
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 757
Number of LACNIC addresses announced to Internet: 128429352
Equivalent to 7 /8s, 167 /16s and 173 /24s
Percentage of available LACNIC address space announced: 76.5

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: 10810
Total AfriNIC prefixes after maximum aggregation: 2501
AfriNIC Deaggregation factor: 4.32
Prefixes being announced from the AfriNIC address blocks: 11398
Unique aggregates announced from the AfriNIC address blocks: 3844
AfriNIC Region origin ASes present in the Internet Routing Table: 622
AfriNIC Prefixes per ASN: 18.32
AfriNIC Region origin ASes announcing only one prefix: 186
AfriNIC Region transit ASes present in the Internet Routing Table: 133
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: 46415616
Equivalent to 2 /8s, 196 /16s and 63 /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 2951 11558 923 Korea Telecom (KIX)
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1897 320 109 TPG Internet Pty Ltd
4755 1726 390 190 TATA Communications formerly
9829 1509 1205 40 BSNL National Internet Backbo
9583 1285 98 533 Sify Limited
7552 1173 1064 12 Vietel Corporation
4808 1118 2113 328 CNCGROUP IP network: China169
9498 1099 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 3021 3693 84 bellsouth.net, inc.
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1992 677 125 PaeTec Communications, Inc.
22773 1971 2929 125 Cox Communications, Inc.
20115 1672 1610 614 Charter Communications
4323 1609 1139 398 Time Warner Telecom
30036 1335 297 653 Mediacom Communications Corp
7018 1313 10820 849 AT&T WorldNet Services
11492 1242 228 331 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 1806 544 16 Corbina telecom
2118 1390 97 13 EUnet/RELCOM Autonomous Syste
34984 1173 237 215 BILISIM TELEKOM
12479 840 785 66 Uni2 Autonomous System
13188 834 99 64 Educational Network
20940 832 291 657 Akamai Technologies European
31148 795 41 21 FreeNet ISP
8551 773 370 43 Bezeq International
6830 770 2376 443 UPC Distribution Services
34744 672 180 53 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 2675 1458 105 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
7303 1687 1157 219 Telecom Argentina Stet-France
8151 1240 2700 391 UniNet S.A. de C.V.
6503 1013 435 67 AVANTEL, S.A.
18881 914 780 19 Global Village Telecom
27947 818 88 95 Telconet S.A
11830 716 364 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 887 274 34 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 460 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 262 906 220 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 3021 3693 84 bellsouth.net, inc.
4766 2951 11558 923 Korea Telecom (KIX)
28573 2675 1458 105 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 1992 677 125 PaeTec Communications, Inc.
22773 1971 2929 125 Cox Communications, Inc.
7545 1897 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 2675 2570 NET Servicos de Comunicao S.A
17974 2512 2422 PT TELEKOMUNIKASI INDONESIA
10620 2624 2400 TVCABLE BOGOTA
4766 2951 2028 Korea Telecom (KIX)
7029 2140 1929 Windstream Communications Inc
18566 2067 1883 Covad Communications
1785 1992 1867 PaeTec Communications, Inc.
22773 1971 1846 Cox Communications, Inc.
8402 1806 1790 Corbina telecom
7545 1897 1788 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
128.0.52.0/24 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
/13:491 /14:887 /15:1568 /16:12693 /17:6632 /18:11119
/19:22093 /20:32006 /21:34042 /22:47263 /23:42083 /24:238127
/25:1364 /26:1756 /27:869 /28:43 /29:67 /30:18
/31:0 /32:18

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

ASN No of nets Total ann. Description
18566 2018 2067 Covad Communications
6389 1729 3021 bellsouth.net, inc.
7029 1606 2140 Windstream Communications Inc
8402 1510 1806 Corbina telecom
22773 1281 1971 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1208 1335 Mediacom Communications Corp
11492 1201 1242 Cable One
1785 1061 1992 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)
----------------------------------------------

1:782 2:787 3:3 4:15 5:875 6:7
8:554 12:1920 13:3 14:774 15:11 16:3
17:9 20:18 23:274 24:1762 27:1499 31:1265
32:43 33:2 34:5 36:44 37:1819 38:868
39:2 40:172 41:2791 42:187 44:6 46:1887
47:2 49:630 50:685 52:12 54:32 55:7
57:26 58:1137 59:567 60:306 61:1390 62:1047
63:2041 64:4319 65:2172 66:4319 67:2052 68:1129
69:3256 70:873 71:535 72:1943 74:2552 75:410
76:292 77:1108 78:1052 79:581 80:1264 81:987
82:625 83:557 84:526 85:1167 86:462 87:979
88:540 89:1800 90:280 91:5448 92:633 93:1725
94:1856 95:1527 96:526 97:342 98:1051 99:41
100:30 101:319 103:2521 105:535 106:143 107:209
108:519 109:1847 110:867 111:1048 112:508 113:783
114:706 115:937 116:898 117:791 118:1054 119:1263
120:402 121:718 122:1770 123:1235 124:1351 125:1338
128:633 129:221 130:315 131:648 132:339 133:149
134:254 135:66 136:222 137:256 138:346 139:196
140:207 141:323 142:549 143:391 144:485 145:92
146:494 147:393 148:690 149:371 150:158 151:566
152:414 153:195 154:42 155:398 156:264 157:400
158:276 159:726 160:358 161:428 162:419 163:212
164:590 165:451 166:301 167:581 168:1031 169:141
170:1029 171:178 172:4 173:1604 174:586 175:464
176:1285 177:1945 178:1838 179:5 180:1409 181:420
182:1150 183:383 184:675 185:408 186:2303 187:1312
188:2050 189:1351 190:6346 192:6570 193:5844 194:4666
195:3454 196:1343 197:905 198:4413 199:5296 200:5931
201:2398 202:8836 203:8828 204:4514 205:2560 206:2840
207:2885 208:4054 209:3622 210:2942 211:1552 212:2066
213:1909 214:911 215:98 216:5254 217:1570 218:616
219:331 220:1278 221:555 222:319 223:441

End of report
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