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 12, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 13 May, 2013

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

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

BGP routing table entries examined: 454502
Prefixes after maximum aggregation: 185125
Deaggregation factor: 2.46
Unique aggregates announced to Internet: 224305
Total ASes present in the Internet Routing Table: 44041
Prefixes per ASN: 10.32
Origin-only ASes present in the Internet Routing Table: 34578
Origin ASes announcing only one prefix: 16100
Transit ASes present in the Internet Routing Table: 5836
Transit-only ASes present in the Internet Routing Table: 152
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 39
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 316
Unregistered ASNs in the Routing Table: 131
Number of 32-bit ASNs allocated by the RIRs: 4760
Number of 32-bit ASNs visible in the Routing Table: 3627
Prefixes from 32-bit ASNs in the Routing Table: 10320
Special use prefixes present in the Routing Table: 22
Prefixes being announced from unallocated address space: 234
Number of addresses announced to Internet: 2614266604
Equivalent to 155 /8s, 210 /16s and 138 /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: 94.5
Total number of prefixes smaller than registry allocations: 160415

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

Prefixes being announced by APNIC Region ASes: 108873
Total APNIC prefixes after maximum aggregation: 33434
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 110193
Unique aggregates announced from the APNIC address blocks: 44869
APNIC Region origin ASes present in the Internet Routing Table: 4836
APNIC Prefixes per ASN: 22.79
APNIC Region origin ASes announcing only one prefix: 1220
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: 520
Number of APNIC addresses announced to Internet: 721107424
Equivalent to 42 /8s, 251 /16s and 57 /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: 159449
Total ARIN prefixes after maximum aggregation: 80166
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 160089
Unique aggregates announced from the ARIN address blocks: 73435
ARIN Region origin ASes present in the Internet Routing Table: 15681
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5967
ARIN Region transit ASes present in the Internet Routing Table: 1638
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 39
Number of ARIN region 32-bit ASNs visible in the Routing Table: 19
Number of ARIN addresses announced to Internet: 1061490560
Equivalent to 63 /8s, 69 /16s and 15 /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: 117177
Total RIPE prefixes after maximum aggregation: 59732
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 120713
Unique aggregates announced from the RIPE address blocks: 77813
RIPE Region origin ASes present in the Internet Routing Table: 17165
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8150
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: 2319
Number of RIPE addresses announced to Internet: 656329572
Equivalent to 39 /8s, 30 /16s and 203 /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: 47798
Total LACNIC prefixes after maximum aggregation: 9261
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 51909
Unique aggregates announced from the LACNIC address blocks: 24109
LACNIC Region origin ASes present in the Internet Routing Table: 1929
LACNIC Prefixes per ASN: 26.91
LACNIC Region origin ASes announcing only one prefix: 577
LACNIC Region transit ASes present in the Internet Routing Table: 356
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 763
Number of LACNIC addresses announced to Internet: 128582440
Equivalent to 7 /8s, 170 /16s and 3 /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: 10800
Total AfriNIC prefixes after maximum aggregation: 2492
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 11364
Unique aggregates announced from the AfriNIC address blocks: 3862
AfriNIC Region origin ASes present in the Internet Routing Table: 624
AfriNIC Prefixes per ASN: 18.21
AfriNIC Region origin ASes announcing only one prefix: 186
AfriNIC Region transit ASes present in the Internet Routing Table: 131
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: 46405888
Equivalent to 2 /8s, 196 /16s and 25 /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 2959 11559 924 Korea Telecom (KIX)
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7545 1902 320 108 TPG Internet Pty Ltd
4755 1725 390 191 TATA Communications formerly
9829 1508 1205 40 BSNL National Internet Backbo
9583 1218 91 501 Sify Limited
7552 1172 1064 12 Vietel Corporation
4808 1120 2113 328 CNCGROUP IP network: China169
9498 1099 309 71 BHARTI Airtel Ltd.
24560 1069 393 166 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 3016 3693 82 bellsouth.net, inc.
7029 2143 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1993 677 125 PaeTec Communications, Inc.
22773 1973 2929 125 Cox Communications, Inc.
20115 1668 1609 617 Charter Communications
4323 1611 1139 398 Time Warner Telecom
30036 1340 297 651 Mediacom Communications Corp
7018 1312 10819 849 AT&T WorldNet Services
11492 1245 228 320 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 1825 544 16 Corbina telecom
2118 1390 97 13 EUnet/RELCOM Autonomous Syste
34984 1186 238 220 BILISIM TELEKOM
13188 834 99 64 Educational Network
20940 826 285 655 Akamai Technologies European
31148 790 39 20 FreeNet ISP
6830 771 2376 444 UPC Distribution Services
8551 771 370 43 Bezeq International
12479 681 782 67 Uni2 Autonomous System
34744 671 172 55 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 2700 1482 109 NET Servicos de Comunicao S.A
10620 2630 412 223 TVCABLE BOGOTA
7303 1689 1157 219 Telecom Argentina Stet-France
8151 1240 2700 395 UniNet S.A. de C.V.
6503 971 435 68 AVANTEL, S.A.
18881 930 780 19 Global Village Telecom
27947 801 88 96 Telconet S.A
11830 710 364 14 Instituto Costarricense de El
3816 706 306 85 Empresa Nacional de Telecomun
7738 698 1370 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 1237 80 4 MOBITEL
24863 888 274 32 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 461 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 261 906 220 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 3016 3693 82 bellsouth.net, inc.
4766 2959 11559 924 Korea Telecom (KIX)
28573 2700 1482 109 NET Servicos de Comunicao S.A
10620 2630 412 223 TVCABLE BOGOTA
17974 2512 839 90 PT TELEKOMUNIKASI INDONESIA
7029 2143 1265 211 Windstream Communications Inc
18566 2067 382 184 Covad Communications
1785 1993 677 125 PaeTec Communications, Inc.
22773 1973 2929 125 Cox Communications, Inc.
7545 1902 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 2700 2591 NET Servicos de Comunicao S.A
17974 2512 2422 PT TELEKOMUNIKASI INDONESIA
10620 2630 2407 TVCABLE BOGOTA
4766 2959 2035 Korea Telecom (KIX)
7029 2143 1932 Windstream Communications Inc
18566 2067 1883 Covad Communications
1785 1993 1868 PaeTec Communications, Inc.
22773 1973 1848 Cox Communications, Inc.
8402 1825 1809 Corbina telecom
7545 1902 1794 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
/13:490 /14:883 /15:1565 /16:12673 /17:6628 /18:11177
/19:22084 /20:32048 /21:34131 /22:47378 /23:42151 /24:238769
/25:1362 /26:1755 /27:867 /28:43 /29:66 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2018 2067 Covad Communications
6389 1728 3016 bellsouth.net, inc.
7029 1611 2143 Windstream Communications Inc
8402 1527 1825 Corbina telecom
22773 1282 1973 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1211 1340 Mediacom Communications Corp
11492 1204 1245 Cable One
1785 1062 1993 PaeTec Communications, Inc.
6983 1008 1134 ITC^Deltacom

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

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

1:808 2:799 3:3 4:15 5:879 6:7
8:556 12:1925 13:3 14:778 15:11 16:3
17:9 20:17 23:276 24:1766 27:1502 31:1277
32:43 33:2 34:5 36:44 37:1852 38:873
39:2 40:172 41:2768 42:190 44:6 46:1888
47:2 49:631 50:694 52:12 54:34 55:8
57:26 58:1140 59:568 60:306 61:1390 62:1080
63:2034 64:4322 65:2183 66:4363 67:2031 68:1127
69:3277 70:872 71:536 72:1945 74:2559 75:413
76:308 77:1106 78:1053 79:586 80:1265 81:994
82:626 83:556 84:526 85:1150 86:461 87:979
88:537 89:1792 90:161 91:5449 92:587 93:1701
94:1853 95:1494 96:527 97:344 98:1052 99:41
100:30 101:329 103:2557 105:535 106:144 107:209
108:520 109:1850 110:867 111:1054 112:509 113:790
114:709 115:941 116:893 117:791 118:1067 119:1284
120:404 121:720 122:1778 123:1245 124:1352 125:1343
128:631 129:223 130:323 131:643 132:339 133:149
134:261 135:66 136:220 137:255 138:346 139:197
140:207 141:327 142:547 143:395 144:485 145:92
146:512 147:408 148:692 149:372 150:158 151:567
152:418 153:199 154:44 155:396 156:263 157:400
158:276 159:732 160:358 161:428 162:419 163:212
164:592 165:453 166:301 167:582 168:1036 169:134
170:1029 171:178 172:6 173:1668 174:587 175:469
176:1293 177:1983 178:1846 179:6 180:1422 181:358
182:1186 183:390 184:674 185:430 186:2283 187:1306
188:2133 189:1334 190:6388 192:6609 193:5868 194:4670
195:3459 196:1329 197:907 198:4425 199:5295 200:5926
201:2411 202:8847 203:8835 204:4511 205:2563 206:2846
207:2891 208:4071 209:3630 210:2941 211:1558 212:2109
213:1939 214:912 215:97 216:5251 217:1596 218:617
219:330 220:1279 221:554 222:319 223:446

End of report
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