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 15, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 16 May, 2012

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

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

BGP routing table entries examined: 407334
Prefixes after maximum aggregation: 173714
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199389
Total ASes present in the Internet Routing Table: 40962
Prefixes per ASN: 9.94
Origin-only ASes present in the Internet Routing Table: 33161
Origin ASes announcing only one prefix: 15631
Transit ASes present in the Internet Routing Table: 5472
Transit-only ASes present in the Internet Routing Table: 134
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 64
Max AS path prepend of ASN ( 9902) 56
Prefixes from unregistered ASNs in the Routing Table: 363
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 2695
Number of 32-bit ASNs visible in the Routing Table: 2329
Prefixes from 32-bit ASNs in the Routing Table: 5881
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2547995056
Equivalent to 151 /8s, 223 /16s and 81 /24s
Percentage of available address space announced: 68.7
Percentage of allocated address space announced: 68.8
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 173832

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

Prefixes being announced by APNIC Region ASes: 100139
Total APNIC prefixes after maximum aggregation: 32432
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96592
Unique aggregates announced from the APNIC address blocks: 39913
APNIC Region origin ASes present in the Internet Routing Table: 4689
APNIC Prefixes per ASN: 20.60
APNIC Region origin ASes announcing only one prefix: 1237
APNIC Region transit ASes present in the Internet Routing Table: 728
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: 205
Number of APNIC addresses announced to Internet: 644752512
Equivalent to 38 /8s, 110 /16s and 36 /24s
Percentage of available APNIC address space announced: 81.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
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, 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: 150916
Total ARIN prefixes after maximum aggregation: 76617
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121681
Unique aggregates announced from the ARIN address blocks: 50865
ARIN Region origin ASes present in the Internet Routing Table: 15106
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 16
Number of ARIN addresses announced to Internet: 812034240
Equivalent to 48 /8s, 102 /16s and 168 /24s
Percentage of available ARIN address space announced: 64.8

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, 173/8,
174/8, 184/8, 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: 99859
Total RIPE prefixes after maximum aggregation: 54133
RIPE Deaggregation factor: 1.84
Prefixes being announced from the RIPE address blocks: 92067
Unique aggregates announced from the RIPE address blocks: 58875
RIPE Region origin ASes present in the Internet Routing Table: 16532
RIPE Prefixes per ASN: 5.57
RIPE Region origin ASes announcing only one prefix: 8039
RIPE Region transit ASes present in the Internet Routing Table: 2636
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1555
Number of RIPE addresses announced to Internet: 512549448
Equivalent to 30 /8s, 140 /16s and 226 /24s
Percentage of available RIPE address space announced: 82.6

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
196608-198655
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,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 41311
Total LACNIC prefixes after maximum aggregation: 8301
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 41293
Unique aggregates announced from the LACNIC address blocks: 20451
LACNIC Region origin ASes present in the Internet Routing Table: 1598
LACNIC Prefixes per ASN: 25.84
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 302
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 548
Number of LACNIC addresses announced to Internet: 100313992
Equivalent to 5 /8s, 250 /16s and 171 /24s
Percentage of available LACNIC address space announced: 66.4

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9052
Total AfriNIC prefixes after maximum aggregation: 2165
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 7086
Unique aggregates announced from the AfriNIC address blocks: 2211
AfriNIC Region origin ASes present in the Internet Routing Table: 537
AfriNIC Prefixes per ASN: 13.20
AfriNIC Region origin ASes announcing only one prefix: 169
AfriNIC Region transit ASes present in the Internet Routing Table: 120
Average AfriNIC Region AS path length visible: 4.5
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31795456
Equivalent to 1 /8s, 229 /16s and 41 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2609 11116 1101 Korea Telecom (KIX)
17974 1923 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1675 300 82 TPG Internet Pty Ltd
4755 1576 385 155 TATA Communications formerly
9829 1282 1069 30 BSNL National Internet Backbo
7552 1165 1062 11 Vietel Corporation
9583 1156 86 500 Sify Limited
4808 1114 2051 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 BHARTI Airtel Ltd.

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 3414 3807 193 bellsouth.net, inc.
7029 3367 985 158 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1904 681 131 PaeTec Communications, Inc.
20115 1635 1565 620 Charter Communications
22773 1606 2911 121 Cox Communications, Inc.
4323 1574 1042 383 Time Warner Telecom
30036 1413 263 752 Mediacom Communications Corp
7018 1249 10036 816 AT&T WorldNet Services
11492 1186 216 364 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 1358 544 16 Corbina telecom
34984 694 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 679 671 69 Uni2 Autonomous System
6830 656 2215 426 UPC Distribution Services
20940 655 216 510 Akamai Technologies European
8551 567 360 80 Bezeq International
3320 486 8442 402 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark
8866 436 134 27 Bulgarian Telecommunication C

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
10620 1869 334 175 TVCABLE BOGOTA
28573 1837 1149 69 NET Servicos de Comunicao S.A
6503 1523 418 65 AVANTEL, S.A.
8151 1477 3005 343 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 694 74 98 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 576 243 98 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
8452 1309 958 13 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 82 MTN Network Solutions
15706 164 32 6 Sudatel Internet Exchange Aut
29571 157 15 16 Ci Telecom Autonomous system

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 3414 3807 193 bellsouth.net, inc.
7029 3367 985 158 Windstream Communications Inc
4766 2609 11116 1101 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
17974 1923 530 80 PT TELEKOMUNIKASI INDONESIA
1785 1904 681 131 PaeTec Communications, Inc.
10620 1869 334 175 TVCABLE BOGOTA
28573 1837 1149 69 NET Servicos de Comunicao S.A
7545 1675 300 82 TPG Internet Pty Ltd
20115 1635 1565 620 Charter Communications

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
7029 3367 3209 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1923 1843 PT TELEKOMUNIKASI INDONESIA
1785 1904 1773 PaeTec Communications, Inc.
28573 1837 1768 NET Servicos de Comunicao S.A
10620 1869 1694 TVCABLE BOGOTA
7545 1675 1593 TPG Internet Pty Ltd
4766 2609 1508 Korea Telecom (KIX)
22773 1606 1485 Cox Communications, Inc.
6503 1523 1458 AVANTEL, S.A.

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
32567 UNALLOCATED 12.14.170.0/24 4323 Time Warner Telecom
32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom
25639 UNALLOCATED 12.41.169.0/24 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 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
5.34.240.0/23 57858 Fiber Grid OU
5.34.248.0/21 23456 32-bit ASN transition
5.35.160.0/21 8681 Jersey Telecoms Island Networ
5.39.0.0/17 16276 AS for Ovh
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg

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 /8:19 /9:12 /10:29 /11:81 /12:235
/13:460 /14:832 /15:1493 /16:12242 /17:6251 /18:10577
/19:20701 /20:29346 /21:30593 /22:39882 /23:38291 /24:212556
/25:1214 /26:1448 /27:808 /28:160 /29:67 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3024 3367 Windstream Communications Inc
6389 2133 3414 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1715 1869 TVCABLE BOGOTA
30036 1354 1413 Mediacom Communications Corp
8402 1336 1358 Corbina telecom
6503 1282 1523 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1309 TEDATA
7011 1069 1184 Citizens Utilities

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

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

1:543 2:558 4:14 5:10 6:3 8:412
12:2002 13:1 14:611 15:12 16:3 17:5
20:23 23:167 24:1771 27:1304 31:960 32:57
33:2 34:2 36:8 37:460 38:810 40:120
41:3127 42:136 44:3 46:1425 47:3 49:404
50:549 52:13 54:10 55:9 56:3 57:32
58:958 59:483 60:253 61:1226 62:991 63:2058
64:4171 65:2246 66:4464 67:2011 68:1164 69:3206
70:906 71:484 72:1822 74:2597 75:488 76:323
77:936 78:977 79:493 80:1212 81:909 82:665
83:556 84:489 85:1220 86:437 87:917 88:334
89:1697 90:290 91:4829 92:541 93:1321 94:1521
95:1020 96:368 97:316 98:870 99:38 100:7
101:190 103:1070 106:103 107:187 108:286 109:1327
110:769 111:918 112:408 113:603 114:632 115:832
116:936 117:715 118:907 119:1232 120:354 121:691
122:1667 123:1105 124:1385 125:1254 128:539 129:194
130:252 131:630 132:177 133:22 134:248 135:62
136:214 137:178 138:358 139:184 140:492 141:243
142:414 143:455 144:521 145:70 146:496 147:291
148:771 149:303 150:187 151:177 152:469 153:172
154:12 155:403 156:221 157:381 158:183 159:546
160:338 161:261 162:347 163:190 164:588 165:386
166:572 167:468 168:858 169:126 170:861 171:131
172:4 173:1739 174:574 175:431 176:585 177:738
178:1365 180:1214 181:82 182:977 183:294 184:490
185:1 186:2274 187:1076 188:1273 189:1793 190:5527
192:6000 193:5288 194:3803 195:3207 196:1276 197:135
198:3654 199:4630 200:5847 201:1921 202:8568 203:8606
204:4336 205:2524 206:2766 207:2799 208:4070 209:3621
210:2753 211:1509 212:2026 213:1936 214:858 215:104
216:5094 217:1535 218:544 219:312 220:1228 221:558
222:322 223:341

End of report
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