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.

Monday, May 6, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 07 May, 2013

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

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

BGP routing table entries examined: 453583
Prefixes after maximum aggregation: 185011
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 223683
Total ASes present in the Internet Routing Table: 43996
Prefixes per ASN: 10.31
Origin-only ASes present in the Internet Routing Table: 34558
Origin ASes announcing only one prefix: 16086
Transit ASes present in the Internet Routing Table: 5830
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: 4753
Number of 32-bit ASNs visible in the Routing Table: 3608
Prefixes from 32-bit ASNs in the Routing Table: 10220
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 188
Number of addresses announced to Internet: 2615773932
Equivalent to 155 /8s, 233 /16s and 138 /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: 160093

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

Prefixes being announced by APNIC Region ASes: 108636
Total APNIC prefixes after maximum aggregation: 33397
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 109932
Unique aggregates announced from the APNIC address blocks: 44720
APNIC Region origin ASes present in the Internet Routing Table: 4835
APNIC Prefixes per ASN: 22.74
APNIC Region origin ASes announcing only one prefix: 1225
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: 30
Number of APNIC region 32-bit ASNs visible in the Routing Table: 516
Number of APNIC addresses announced to Internet: 720805600
Equivalent to 42 /8s, 246 /16s and 158 /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: 158995
Total ARIN prefixes after maximum aggregation: 80036
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 159634
Unique aggregates announced from the ARIN address blocks: 73123
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: 5964
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: 1063418752
Equivalent to 63 /8s, 98 /16s and 123 /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: 117084
Total RIPE prefixes after maximum aggregation: 59699
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120598
Unique aggregates announced from the RIPE address blocks: 77596
RIPE Region origin ASes present in the Internet Routing Table: 17161
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8143
RIPE Region transit ASes present in the Internet Routing Table: 2802
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: 656337252
Equivalent to 39 /8s, 30 /16s and 233 /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: 47732
Total LACNIC prefixes after maximum aggregation: 9328
LACNIC Deaggregation factor: 5.12
Prefixes being announced from the LACNIC address blocks: 51813
Unique aggregates announced from the LACNIC address blocks: 24206
LACNIC Region origin ASes present in the Internet Routing Table: 1919
LACNIC Prefixes per ASN: 27.00
LACNIC Region origin ASes announcing only one prefix: 565
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: 756
Number of LACNIC addresses announced to Internet: 128457768
Equivalent to 7 /8s, 168 /16s and 28 /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: 10831
Total AfriNIC prefixes after maximum aggregation: 2511
AfriNIC Deaggregation factor: 4.31
Prefixes being announced from the AfriNIC address blocks: 11418
Unique aggregates announced from the AfriNIC address blocks: 3865
AfriNIC Region origin ASes present in the Internet Routing Table: 628
AfriNIC Prefixes per ASN: 18.18
AfriNIC Region origin ASes announcing only one prefix: 189
AfriNIC Region transit ASes present in the Internet Routing Table: 134
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: 46424064
Equivalent to 2 /8s, 196 /16s and 96 /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 2513 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1896 320 108 TPG Internet Pty Ltd
4755 1726 390 190 TATA Communications formerly
9829 1509 1205 40 BSNL National Internet Backbo
9583 1218 91 500 Sify Limited
7552 1173 1064 12 Vietel Corporation
4808 1118 2113 328 CNCGROUP IP network: China169
9498 1098 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 3020 3693 84 bellsouth.net, inc.
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1991 677 125 PaeTec Communications, Inc.
22773 1971 2929 125 Cox Communications, Inc.
20115 1672 1610 614 Charter Communications
4323 1608 1139 398 Time Warner Telecom
30036 1336 297 652 Mediacom Communications Corp
7018 1314 10820 850 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 1848 544 16 Corbina telecom
2118 1390 97 13 EUnet/RELCOM Autonomous Syste
34984 1175 237 216 BILISIM TELEKOM
12479 840 785 66 Uni2 Autonomous System
13188 834 99 64 Educational Network
20940 823 286 650 Akamai Technologies European
31148 795 41 21 FreeNet ISP
8551 773 370 43 Bezeq International
6830 771 2376 444 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 2683 1470 108 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
7303 1683 1156 216 Telecom Argentina Stet-France
8151 1239 2700 392 UniNet S.A. de C.V.
6503 1014 435 68 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 537 617 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 3020 3693 84 bellsouth.net, inc.
4766 2958 11558 925 Korea Telecom (KIX)
28573 2683 1470 108 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
17974 2513 839 90 PT TELEKOMUNIKASI INDONESIA
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1991 677 125 PaeTec Communications, Inc.
22773 1971 2929 125 Cox Communications, Inc.
7545 1896 320 108 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 2683 2575 NET Servicos de Comunicao S.A
17974 2513 2423 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 1991 1866 PaeTec Communications, Inc.
22773 1971 1846 Cox Communications, Inc.
8402 1848 1832 Corbina telecom
7545 1896 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 /15:1567 /16:12682 /17:6631 /18:11121
/19:22097 /20:32008 /21:34063 /22:47282 /23:42085 /24:238137
/25:1363 /26:1757 /27:871 /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 1728 3020 bellsouth.net, inc.
7029 1606 2140 Windstream Communications Inc
8402 1552 1848 Corbina telecom
22773 1281 1971 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1209 1336 Mediacom Communications Corp
11492 1201 1242 Cable One
1785 1060 1991 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 2:808 3:3 4:15 5:876 6:7
8:554 12:1922 13:3 14:777 15:11 16:3
17:9 20:17 23:274 24:1762 27:1496 31:1267
32:43 33:2 34:5 36:44 37:1827 38:869
39:2 40:172 41:2787 42:187 44:6 46:1888
47:2 49:632 50:685 52:12 54:32 55:7
57:26 58:1139 59:567 60:306 61:1387 62:1053
63:2042 64:4303 65:2172 66:4318 67:2048 68:1129
69:3192 70:873 71:535 72:1943 74:2550 75:409
76:292 77:1108 78:1052 79:582 80:1262 81:987
82:624 83:557 84:526 85:1166 86:462 87:980
88:540 89:1802 90:280 91:5449 92:634 93:1726
94:1857 95:1547 96:494 97:343 98:1050 99:41
100:30 101:320 103:2528 105:535 106:144 107:209
108:520 109:1847 110:868 111:1049 112:507 113:788
114:707 115:938 116:898 117:792 118:1054 119:1267
120:402 121:723 122:1765 123:1246 124:1350 125:1336
128:632 129:222 130:323 131:648 132:339 133:149
134:254 135:66 136:222 137:256 138:346 139:196
140:207 141:323 142:549 143:385 144:486 145:92
146:495 147:401 148:691 149:371 150:158 151:569
152:414 153:196 154:43 155:398 156:265 157:401
158:276 159:727 160:358 161:430 162:419 163:212
164:590 165:451 166:301 167:582 168:1032 169:134
170:1029 171:178 172:4 173:1597 174:585 175:465
176:1283 177:1929 178:1840 179:5 180:1412 181:420
182:1164 183:383 184:673 185:416 186:2315 187:1314
188:2046 189:1359 190:6310 192:6582 193:5846 194:4665
195:3454 196:1345 197:905 198:4412 199:5287 200:5928
201:2412 202:8843 203:8834 204:4515 205:2558 206:2840
207:2883 208:4053 209:3619 210:2939 211:1553 212:2071
213:1916 214:914 215:98 216:5253 217:1573 218:617
219:330 220:1278 221:555 222:319 223:440

End of report
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