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, April 28, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 452486
Prefixes after maximum aggregation: 184933
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 223220
Total ASes present in the Internet Routing Table: 43961
Prefixes per ASN: 10.29
Origin-only ASes present in the Internet Routing Table: 34554
Origin ASes announcing only one prefix: 16085
Transit ASes present in the Internet Routing Table: 5807
Transit-only ASes present in the Internet Routing Table: 147
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: 315
Unregistered ASNs in the Routing Table: 131
Number of 32-bit ASNs allocated by the RIRs: 4742
Number of 32-bit ASNs visible in the Routing Table: 3600
Prefixes from 32-bit ASNs in the Routing Table: 10192
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 192
Number of addresses announced to Internet: 2615770700
Equivalent to 155 /8s, 233 /16s and 126 /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: 94.4
Total number of prefixes smaller than registry allocations: 159623

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

Prefixes being announced by APNIC Region ASes: 108340
Total APNIC prefixes after maximum aggregation: 33426
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 109593
Unique aggregates announced from the APNIC address blocks: 44577
APNIC Region origin ASes present in the Internet Routing Table: 4838
APNIC Prefixes per ASN: 22.65
APNIC Region origin ASes announcing only one prefix: 1230
APNIC Region transit ASes present in the Internet Routing Table: 817
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 510
Number of APNIC addresses announced to Internet: 720930016
Equivalent to 42 /8s, 248 /16s and 132 /24s
Percentage of available APNIC address space announced: 84.3

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: 158925
Total ARIN prefixes after maximum aggregation: 79944
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 159571
Unique aggregates announced from the ARIN address blocks: 72912
ARIN Region origin ASes present in the Internet Routing Table: 15661
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5954
ARIN Region transit ASes present in the Internet Routing Table: 1622
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: 1063087744
Equivalent to 63 /8s, 93 /16s and 110 /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: 116860
Total RIPE prefixes after maximum aggregation: 59594
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120413
Unique aggregates announced from the RIPE address blocks: 77360
RIPE Region origin ASes present in the Internet Routing Table: 17150
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8140
RIPE Region transit ASes present in the Internet Routing Table: 2793
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: 2307
Number of RIPE addresses announced to Internet: 656960740
Equivalent to 39 /8s, 40 /16s and 108 /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: 47482
Total LACNIC prefixes after maximum aggregation: 9424
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 51525
Unique aggregates announced from the LACNIC address blocks: 24364
LACNIC Region origin ASes present in the Internet Routing Table: 1917
LACNIC Prefixes per ASN: 26.88
LACNIC Region origin ASes announcing only one prefix: 572
LACNIC Region transit ASes present in the Internet Routing Table: 350
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: 759
Number of LACNIC addresses announced to Internet: 128055560
Equivalent to 7 /8s, 161 /16s and 249 /24s
Percentage of available LACNIC address space announced: 76.3

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: 10604
Total AfriNIC prefixes after maximum aggregation: 2505
AfriNIC Deaggregation factor: 4.23
Prefixes being announced from the AfriNIC address blocks: 11192
Unique aggregates announced from the AfriNIC address blocks: 3830
AfriNIC Region origin ASes present in the Internet Routing Table: 621
AfriNIC Prefixes per ASN: 18.02
AfriNIC Region origin ASes announcing only one prefix: 189
AfriNIC Region transit ASes present in the Internet Routing Table: 132
Average AfriNIC Region AS path length visible: 4.8
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: 46337280
Equivalent to 2 /8s, 195 /16s and 13 /24s
Percentage of available AfriNIC address space announced: 46.0

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 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1887 320 108 TPG Internet Pty Ltd
4755 1721 390 190 TATA Communications formerly
9829 1507 1205 40 BSNL National Internet Backbo
9583 1285 98 538 Sify Limited
7552 1172 1064 12 Vietel Corporation
4808 1116 2109 327 CNCGROUP IP network: China169
9498 1092 310 73 BHARTI Airtel Ltd.
24560 1071 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 3033 3694 86 bellsouth.net, inc.
7029 2150 1265 212 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1990 677 124 PaeTec Communications, Inc.
22773 1970 2929 125 Cox Communications, Inc.
20115 1668 1610 613 Charter Communications
4323 1609 1139 398 Time Warner Telecom
30036 1342 298 652 Mediacom Communications Corp
7018 1315 10805 850 AT&T WorldNet Services
11492 1239 228 330 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 1841 544 16 Corbina telecom
2118 1430 97 13 EUnet/RELCOM Autonomous Syste
34984 1149 235 206 BILISIM TELEKOM
12479 839 785 66 Uni2 Autonomous System
13188 834 99 70 Educational Network
20940 824 286 655 Akamai Technologies European
31148 797 41 21 FreeNet ISP
6830 775 2376 446 UPC Distribution Services
8551 763 370 43 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 2697 1468 102 NET Servicos de Comunicao S.A
10620 2383 413 215 TVCABLE BOGOTA
7303 1683 1154 215 Telecom Argentina Stet-France
8151 1236 2692 395 UniNet S.A. de C.V.
6503 1065 435 68 AVANTEL, S.A.
18881 908 780 19 Global Village Telecom
27947 815 88 94 Telconet S.A
11830 716 364 14 Instituto Costarricense de El
7738 698 1370 35 Telecomunicacoes da Bahia S.A
3816 696 306 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 1286 80 4 MOBITEL
24863 751 274 33 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 460 956 9 TEDATA
24835 274 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
15706 223 32 6 Sudatel Internet Exchange Aut
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
36992 179 527 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 3033 3694 86 bellsouth.net, inc.
4766 2950 11558 922 Korea Telecom (KIX)
28573 2697 1468 102 NET Servicos de Comunicao S.A
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
10620 2383 413 215 TVCABLE BOGOTA
7029 2150 1265 212 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1990 677 124 PaeTec Communications, Inc.
22773 1970 2929 125 Cox Communications, Inc.
7545 1887 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 2697 2595 NET Servicos de Comunicao S.A
17974 2512 2422 PT TELEKOMUNIKASI INDONESIA
10620 2383 2168 TVCABLE BOGOTA
4766 2950 2028 Korea Telecom (KIX)
7029 2150 1938 Windstream Communications Inc
18566 2067 1883 Covad Communications
1785 1990 1866 PaeTec Communications, Inc.
22773 1970 1845 Cox Communications, Inc.
8402 1841 1825 Corbina telecom
7545 1887 1779 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 /12:250
/13:487 /14:886 /15:1568 /16:12690 /17:6638 /18:11118
/19:22047 /20:32008 /21:33967 /22:47068 /23:41964 /24:237646
/25:1339 /26:1662 /27:858 /28:43 /29:66 /30:18
/31:0 /32:17

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

ASN No of nets Total ann. Description
18566 2018 2067 Covad Communications
6389 1738 3033 bellsouth.net, inc.
7029 1609 2150 Windstream Communications Inc
8402 1545 1841 Corbina telecom
22773 1280 1970 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1216 1342 Mediacom Communications Corp
11492 1198 1239 Cable One
1785 1060 1990 PaeTec Communications, Inc.
6983 1006 1133 ITC^Deltacom

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

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

1:780 2:807 3:3 4:15 5:873 6:5
8:548 12:1917 13:3 14:776 15:11 16:3
17:9 20:18 23:274 24:1763 27:1494 31:1260
32:43 33:2 34:5 36:44 37:1801 38:866
39:2 40:171 41:2750 42:186 44:6 46:1875
47:2 49:629 50:686 52:12 54:32 55:8
57:26 58:1140 59:566 60:308 61:1388 62:1036
63:2038 64:4317 65:2174 66:4324 67:2067 68:1119
69:3248 70:874 71:535 72:1955 74:2555 75:416
76:289 77:1110 78:1054 79:586 80:1244 81:984
82:614 83:570 84:523 85:1166 86:463 87:978
88:527 89:1800 90:280 91:5499 92:619 93:1721
94:1854 95:1547 96:522 97:343 98:1049 99:41
100:29 101:318 103:2498 105:520 106:144 107:209
108:517 109:1838 110:865 111:1047 112:501 113:785
114:699 115:938 116:890 117:798 118:1065 119:1267
120:403 121:721 122:1757 123:1232 124:1337 125:1335
128:630 129:222 130:324 131:653 132:340 133:149
134:254 135:64 136:223 137:249 138:346 139:196
140:206 141:323 142:549 143:375 144:488 145:92
146:508 147:386 148:693 149:370 150:160 151:537
152:417 153:195 154:39 155:397 156:265 157:393
158:275 159:724 160:337 161:425 162:407 163:212
164:591 165:450 166:312 167:580 168:1026 169:133
170:1026 171:177 172:5 173:1603 174:589 175:461
176:1276 177:1889 178:1837 179:5 180:1413 181:412
182:1145 183:385 184:671 185:396 186:2307 187:1320
188:2044 189:1378 190:6206 192:6554 193:5841 194:4655
195:3490 196:1330 197:954 198:4404 199:5286 200:5904
201:2396 202:8872 203:8801 204:4512 205:2562 206:2843
207:2855 208:4063 209:3615 210:2945 211:1552 212:2042
213:1899 214:905 215:98 216:5235 217:1573 218:619
219:330 220:1274 221:554 222:317 223:445

End of report
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