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 8, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 09 May, 2012

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

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

BGP routing table entries examined: 406306
Prefixes after maximum aggregation: 173303
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198616
Total ASes present in the Internet Routing Table: 40908
Prefixes per ASN: 9.93
Origin-only ASes present in the Internet Routing Table: 33139
Origin ASes announcing only one prefix: 15635
Transit ASes present in the Internet Routing Table: 5471
Transit-only ASes present in the Internet Routing Table: 137
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: 425
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2669
Number of 32-bit ASNs visible in the Routing Table: 2298
Prefixes from 32-bit ASNs in the Routing Table: 5797
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2545092496
Equivalent to 151 /8s, 179 /16s and 7 /24s
Percentage of available address space announced: 68.7
Percentage of allocated address space announced: 68.7
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.5
Total number of prefixes smaller than registry allocations: 173294

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

Prefixes being announced by APNIC Region ASes: 99582
Total APNIC prefixes after maximum aggregation: 32250
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96042
Unique aggregates announced from the APNIC address blocks: 39742
APNIC Region origin ASes present in the Internet Routing Table: 4685
APNIC Prefixes per ASN: 20.50
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 730
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 200
Number of APNIC addresses announced to Internet: 644542336
Equivalent to 38 /8s, 106 /16s and 239 /24s
Percentage of available APNIC address space announced: 81.7

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: 150387
Total ARIN prefixes after maximum aggregation: 76468
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121477
Unique aggregates announced from the ARIN address blocks: 50669
ARIN Region origin ASes present in the Internet Routing Table: 15075
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1592
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: 17
Number of ARIN addresses announced to Internet: 810088640
Equivalent to 48 /8s, 72 /16s and 248 /24s
Percentage of available ARIN address space announced: 64.6

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: 100124
Total RIPE prefixes after maximum aggregation: 54053
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92274
Unique aggregates announced from the RIPE address blocks: 58577
RIPE Region origin ASes present in the Internet Routing Table: 16544
RIPE Prefixes per ASN: 5.58
RIPE Region origin ASes announcing only one prefix: 8045
RIPE Region transit ASes present in the Internet Routing Table: 2645
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1537
Number of RIPE addresses announced to Internet: 512343624
Equivalent to 30 /8s, 137 /16s and 190 /24s
Percentage of available RIPE address space announced: 82.5

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
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: 41263
Total LACNIC prefixes after maximum aggregation: 8276
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 41190
Unique aggregates announced from the LACNIC address blocks: 20430
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 25.81
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 299
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: 539
Number of LACNIC addresses announced to Internet: 100141960
Equivalent to 5 /8s, 248 /16s and 11 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8914
Total AfriNIC prefixes after maximum aggregation: 2139
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6958
Unique aggregates announced from the AfriNIC address blocks: 2228
AfriNIC Region origin ASes present in the Internet Routing Table: 535
AfriNIC Prefixes per ASN: 13.01
AfriNIC Region origin ASes announcing only one prefix: 169
AfriNIC Region transit ASes present in the Internet Routing Table: 121
Average AfriNIC Region AS path length visible: 4.6
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: 31800064
Equivalent to 1 /8s, 229 /16s and 59 /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 2511 11113 1014 Korea Telecom (KIX)
17974 1864 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 86 TPG Internet Pty Ltd
4755 1576 385 152 TATA Communications formerly
9829 1280 1069 30 BSNL National Internet Backbo
7552 1178 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
4808 1104 2049 315 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 65 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 3420 3807 194 bellsouth.net, inc.
7029 3383 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1896 680 130 PaeTec Communications, Inc.
20115 1638 1565 620 Charter Communications
4323 1607 1044 384 Time Warner Telecom
22773 1592 2911 115 Cox Communications, Inc.
30036 1427 261 758 Mediacom Communications Corp
7018 1249 10038 818 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 1616 544 16 Corbina telecom
34984 688 188 172 BILISIM TELEKOM
31148 684 37 9 FreeNet ISP
12479 673 670 68 Uni2 Autonomous System
6830 656 2215 427 UPC Distribution Services
20940 652 213 507 Akamai Technologies European
8551 572 360 80 Bezeq International
3320 534 8442 399 Deutsche Telekom AG
2578 500 33 7 Demos, Moscow, Russia
3292 473 2108 407 TDC Tele Danmark

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 1854 332 184 TVCABLE BOGOTA
28573 1788 1135 57 NET Servicos de Comunicao S.A
6503 1527 418 67 AVANTEL, S.A.
8151 1471 3001 340 UniNet S.A. de C.V.
7303 1370 837 187 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 685 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 563 240 99 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 1307 958 13 TEDATA
24863 844 274 35 LINKdotNET AS number
6713 492 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 83 MTN Network Solutions
29571 158 15 16 Ci Telecom Autonomous system
36923 157 20 4 Swift Networks Limited

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 3420 3807 194 bellsouth.net, inc.
7029 3383 986 159 Windstream Communications Inc
4766 2511 11113 1014 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1896 680 130 PaeTec Communications, Inc.
17974 1864 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 184 TVCABLE BOGOTA
28573 1788 1135 57 NET Servicos de Comunicao S.A
7545 1679 301 86 TPG Internet Pty Ltd
20115 1638 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 3383 3224 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1864 1791 PT TELEKOMUNIKASI INDONESIA
1785 1896 1766 PaeTec Communications, Inc.
28573 1788 1731 NET Servicos de Comunicao S.A
10620 1854 1670 TVCABLE BOGOTA
8402 1616 1600 Corbina telecom
7545 1679 1593 TPG Internet Pty Ltd
4766 2511 1497 Korea Telecom (KIX)
22773 1592 1477 Cox Communications, Inc.

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
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
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.222.79.0/24 36938 >>UNKNOWN<<

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 /10:28 /11:82 /12:235
/13:460 /14:831 /15:1495 /16:12237 /17:6234 /18:10566
/19:20662 /20:29248 /21:30165 /22:40078 /23:38096 /24:212185
/25:1191 /26:1428 /27:784 /28:166 /29:67 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3040 3383 Windstream Communications Inc
6389 2138 3420 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1707 1854 TVCABLE BOGOTA
8402 1594 1616 Corbina telecom
30036 1371 1427 Mediacom Communications Corp
6503 1284 1527 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1108 1307 TEDATA
7011 1068 1183 Citizens Utilities

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

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

1:535 2:619 4:14 6:3 8:408 12:1996
13:1 14:613 15:12 16:3 17:5 20:23
23:164 24:1762 27:1247 31:948 32:57 33:2
34:2 36:8 37:435 38:805 40:120 41:3063
42:136 44:3 46:1416 47:3 49:416 50:549
52:13 54:10 55:11 56:3 57:32 58:959
59:483 60:253 61:1208 62:986 63:2053 64:4159
65:2249 66:4477 67:2032 68:1163 69:3176 70:904
71:492 72:1830 74:2586 75:492 76:317 77:943
78:979 79:488 80:1219 81:911 82:666 83:546
84:485 85:1216 86:430 87:908 88:333 89:1694
90:291 91:4781 92:523 93:1464 94:1496 95:886
96:369 97:316 98:873 99:37 100:7 101:186
103:1047 106:103 107:191 108:280 109:1329 110:768
111:903 112:411 113:610 114:631 115:806 116:900
117:715 118:907 119:1220 120:353 121:694 122:1673
123:1105 124:1378 125:1241 128:554 129:194 130:253
131:590 132:178 133:22 134:246 135:62 136:214
137:174 138:356 139:183 140:492 141:243 142:410
143:428 144:517 145:70 146:501 147:287 148:770
149:306 150:158 151:180 152:466 153:172 154:12
155:400 156:217 157:381 158:178 159:544 160:338
161:260 162:347 163:191 164:584 165:385 166:572
167:467 168:820 169:128 170:861 171:128 172:2
173:1754 174:581 175:431 176:617 177:729 178:1357
180:1212 181:81 182:963 183:296 184:483 185:1
186:2259 187:1072 188:1245 189:1771 190:5580 192:6008
193:5293 194:3973 195:3412 196:1271 197:129 198:3656
199:4598 200:5839 201:1933 202:8540 203:8603 204:4332
205:2510 206:2746 207:2798 208:4042 209:3614 210:2735
211:1479 212:2013 213:1925 214:859 215:102 216:5091
217:1540 218:536 219:320 220:1233 221:556 222:322
223:336

End of report
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