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, May 7, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 08 May, 2013

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

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

BGP routing table entries examined: 453537
Prefixes after maximum aggregation: 185136
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 223833
Total ASes present in the Internet Routing Table: 44021
Prefixes per ASN: 10.30
Origin-only ASes present in the Internet Routing Table: 34576
Origin ASes announcing only one prefix: 16095
Transit ASes present in the Internet Routing Table: 5827
Transit-only ASes present in the Internet Routing Table: 150
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: 4756
Number of 32-bit ASNs visible in the Routing Table: 3618
Prefixes from 32-bit ASNs in the Routing Table: 10235
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 191
Number of addresses announced to Internet: 2616113900
Equivalent to 155 /8s, 238 /16s and 186 /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: 160023

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

Prefixes being announced by APNIC Region ASes: 108613
Total APNIC prefixes after maximum aggregation: 33385
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 109930
Unique aggregates announced from the APNIC address blocks: 44698
APNIC Region origin ASes present in the Internet Routing Table: 4838
APNIC Prefixes per ASN: 22.72
APNIC Region origin ASes announcing only one prefix: 1230
APNIC Region transit ASes present in the Internet Routing Table: 822
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: 520
Number of APNIC addresses announced to Internet: 720912096
Equivalent to 42 /8s, 248 /16s and 62 /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: 159199
Total ARIN prefixes after maximum aggregation: 80140
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 159842
Unique aggregates announced from the ARIN address blocks: 73247
ARIN Region origin ASes present in the Internet Routing Table: 15674
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5962
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: 1063614080
Equivalent to 63 /8s, 101 /16s and 118 /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: 116887
Total RIPE prefixes after maximum aggregation: 59717
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120417
Unique aggregates announced from the RIPE address blocks: 77644
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: 2801
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: 2315
Number of RIPE addresses announced to Internet: 656383844
Equivalent to 39 /8s, 31 /16s and 159 /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: 47750
Total LACNIC prefixes after maximum aggregation: 9341
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 51823
Unique aggregates announced from the LACNIC address blocks: 24196
LACNIC Region origin ASes present in the Internet Routing Table: 1921
LACNIC Prefixes per ASN: 26.98
LACNIC Region origin ASes announcing only one prefix: 566
LACNIC Region transit ASes present in the Internet Routing Table: 355
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: 758
Number of LACNIC addresses announced to Internet: 128458792
Equivalent to 7 /8s, 168 /16s and 32 /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: 10768
Total AfriNIC prefixes after maximum aggregation: 2513
AfriNIC Deaggregation factor: 4.28
Prefixes being announced from the AfriNIC address blocks: 11334
Unique aggregates announced from the AfriNIC address blocks: 3872
AfriNIC Region origin ASes present in the Internet Routing Table: 630
AfriNIC Prefixes per ASN: 17.99
AfriNIC Region origin ASes announcing only one prefix: 189
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: 46344960
Equivalent to 2 /8s, 195 /16s and 43 /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 2958 11558 925 Korea Telecom (KIX)
17974 2513 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1904 320 109 TPG Internet Pty Ltd
4755 1727 390 191 TATA Communications formerly
9829 1504 1205 40 BSNL National Internet Backbo
9583 1217 91 500 Sify Limited
7552 1173 1064 12 Vietel Corporation
4808 1120 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 3020 3693 84 bellsouth.net, inc.
7029 2140 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1993 677 125 PaeTec Communications, Inc.
22773 1972 2929 125 Cox Communications, Inc.
20115 1670 1610 614 Charter Communications
4323 1609 1139 398 Time Warner Telecom
30036 1336 297 652 Mediacom Communications Corp
7018 1309 10819 847 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 1829 544 16 Corbina telecom
2118 1390 97 13 EUnet/RELCOM Autonomous Syste
34984 1181 237 219 BILISIM TELEKOM
13188 834 99 64 Educational Network
20940 826 287 653 Akamai Technologies European
31148 794 41 21 FreeNet ISP
8551 773 370 43 Bezeq International
6830 770 2376 443 UPC Distribution Services
12479 680 782 67 Uni2 Autonomous System
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 2687 1472 107 NET Servicos de Comunicao S.A
10620 2624 411 224 TVCABLE BOGOTA
7303 1689 1157 219 Telecom Argentina Stet-France
8151 1240 2700 393 UniNet S.A. de C.V.
6503 1014 435 68 AVANTEL, S.A.
18881 915 780 19 Global Village Telecom
27947 822 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 889 274 34 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 459 956 9 TEDATA
24835 333 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 2687 1472 107 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 1993 677 125 PaeTec Communications, Inc.
22773 1972 2929 125 Cox Communications, Inc.
7545 1904 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 2687 2580 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 1993 1868 PaeTec Communications, Inc.
22773 1972 1847 Cox Communications, Inc.
8402 1829 1813 Corbina telecom
7545 1904 1795 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
23.80.0.0/16 15003 TEGRIS Corporation
23.81.16.0/21 15003 TEGRIS Corporation
23.81.24.0/21 15003 TEGRIS Corporation
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.

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 /16:12684 /17:6632 /18:11114
/19:22083 /20:32006 /21:34029 /22:47257 /23:42092 /24:238162
/25:1365 /26:1758 /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 1728 3020 bellsouth.net, inc.
7029 1606 2140 Windstream Communications Inc
8402 1533 1829 Corbina telecom
22773 1282 1972 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1209 1336 Mediacom Communications Corp
11492 1201 1242 Cable One
1785 1062 1993 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)
----------------------------------------------

1:795 2:805 3:3 4:15 5:878 6:7
8:556 12:1924 13:3 14:776 15:11 16:3
17:9 20:17 23:274 24:1765 27:1500 31:1264
32:43 33:2 34:5 36:44 37:1825 38:871
39:2 40:172 41:2773 42:187 44:6 46:1890
47:2 49:632 50:690 52:12 54:32 55:8
57:26 58:1138 59:565 60:306 61:1389 62:1052
63:2036 64:4309 65:2172 66:4312 67:2044 68:1127
69:3255 70:873 71:534 72:1943 74:2551 75:411
76:291 77:1107 78:1055 79:582 80:1264 81:989
82:624 83:526 84:524 85:1156 86:462 87:979
88:540 89:1800 90:161 91:5442 92:615 93:1725
94:1855 95:1533 96:527 97:343 98:1050 99:41
100:30 101:323 103:2538 105:535 106:144 107:209
108:520 109:1853 110:868 111:1054 112:508 113:789
114:707 115:937 116:899 117:792 118:1051 119:1266
120:403 121:696 122:1766 123:1246 124:1350 125:1347
128:634 129:223 130:323 131:648 132:339 133:149
134:254 135:66 136:222 137:256 138:346 139:196
140:207 141:329 142:546 143:402 144:487 145:92
146:493 147:397 148:691 149:370 150:158 151:567
152:414 153:196 154:44 155:398 156:265 157:402
158:276 159:727 160:358 161:430 162:417 163:212
164:590 165:450 166:301 167:582 168:1033 169:134
170:1025 171:178 172:4 173:1664 174:585 175:465
176:1286 177:1942 178:1839 179:5 180:1415 181:419
182:1169 183:389 184:673 185:418 186:2290 187:1307
188:2057 189:1360 190:6318 192:6591 193:5852 194:4662
195:3455 196:1341 197:901 198:4425 199:5286 200:5927
201:2409 202:8835 203:8832 204:4517 205:2561 206:2843
207:2875 208:4051 209:3618 210:2945 211:1553 212:2074
213:1912 214:914 215:98 216:5252 217:1588 218:618
219:331 220:1281 221:555 222:319 223:443

End of report
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