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 29, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 30 Apr, 2012

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

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

BGP routing table entries examined: 407127
Prefixes after maximum aggregation: 173005
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198089
Total ASes present in the Internet Routing Table: 40842
Prefixes per ASN: 9.97
Origin-only ASes present in the Internet Routing Table: 33124
Origin ASes announcing only one prefix: 15620
Transit ASes present in the Internet Routing Table: 5449
Transit-only ASes present in the Internet Routing Table: 136
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: 396
Unregistered ASNs in the Routing Table: 129
Number of 32-bit ASNs allocated by the RIRs: 2651
Number of 32-bit ASNs visible in the Routing Table: 2269
Prefixes from 32-bit ASNs in the Routing Table: 5645
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 106
Number of addresses announced to Internet: 2540490448
Equivalent to 151 /8s, 108 /16s and 206 /24s
Percentage of available address space announced: 68.5
Percentage of allocated address space announced: 68.6
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: 173654

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

Prefixes being announced by APNIC Region ASes: 99461
Total APNIC prefixes after maximum aggregation: 32274
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 95937
Unique aggregates announced from the APNIC address blocks: 39809
APNIC Region origin ASes present in the Internet Routing Table: 4688
APNIC Prefixes per ASN: 20.46
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 732
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: 189
Number of APNIC addresses announced to Internet: 644220768
Equivalent to 38 /8s, 102 /16s and 7 /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: 150223
Total ARIN prefixes after maximum aggregation: 76344
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121307
Unique aggregates announced from the ARIN address blocks: 50440
ARIN Region origin ASes present in the Internet Routing Table: 15054
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5726
ARIN Region transit ASes present in the Internet Routing Table: 1583
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: 807289792
Equivalent to 48 /8s, 30 /16s and 67 /24s
Percentage of available ARIN address space announced: 64.4

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: 101761
Total RIPE prefixes after maximum aggregation: 53906
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93646
Unique aggregates announced from the RIPE address blocks: 58442
RIPE Region origin ASes present in the Internet Routing Table: 16530
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8046
RIPE Region transit ASes present in the Internet Routing Table: 2627
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: 1526
Number of RIPE addresses announced to Internet: 511394440
Equivalent to 30 /8s, 123 /16s and 66 /24s
Percentage of available RIPE address space announced: 82.4

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
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: 40963
Total LACNIC prefixes after maximum aggregation: 8278
LACNIC Deaggregation factor: 4.95
Prefixes being announced from the LACNIC address blocks: 40843
Unique aggregates announced from the LACNIC address blocks: 20273
LACNIC Region origin ASes present in the Internet Routing Table: 1593
LACNIC Prefixes per ASN: 25.64
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 299
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 532
Number of LACNIC addresses announced to Internet: 99729800
Equivalent to 5 /8s, 241 /16s and 193 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8897
Total AfriNIC prefixes after maximum aggregation: 2135
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6968
Unique aggregates announced from the AfriNIC address blocks: 2221
AfriNIC Region origin ASes present in the Internet Routing Table: 533
AfriNIC Prefixes per ASN: 13.07
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 31782656
Equivalent to 1 /8s, 228 /16s and 247 /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 2484 11112 1010 Korea Telecom (KIX)
17974 1822 509 71 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 88 TPG Internet Pty Ltd
4755 1577 385 156 TATA Communications formerly
9829 1261 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1146 85 491 Sify Limited
4808 1110 2050 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 950 291 62 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 3424 3807 193 bellsouth.net, inc.
7029 3363 986 158 Windstream Communications Inc
18566 2091 382 179 Covad Communications
1785 1906 680 131 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1597 1044 382 Time Warner Telecom
22773 1581 2910 114 Cox Communications, Inc.
30036 1421 261 769 Mediacom Communications Corp
7018 1249 9774 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 1593 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
31148 682 37 9 FreeNet ISP
34984 681 188 173 BILISIM TELEKOM
6830 655 2215 426 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 636 206 498 Akamai Technologies European
8551 571 360 80 Bezeq International
3320 531 8441 397 Deutsche Telekom AG
2578 501 33 7 Demos, Moscow, Russia

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 1851 332 177 TVCABLE BOGOTA
28573 1809 1114 62 NET Servicos de Comunicao S.A
6503 1532 418 65 AVANTEL, S.A.
8151 1481 3000 344 UniNet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 904 761 33 Tim Brasil S.A.
27947 684 74 98 Telconet S.A
11172 639 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 571 242 100 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 839 274 35 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 195 12 24 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 162 666 83 MTN Network Solutions
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 3424 3807 193 bellsouth.net, inc.
7029 3363 986 158 Windstream Communications Inc
4766 2484 11112 1010 Korea Telecom (KIX)
18566 2091 382 179 Covad Communications
1785 1906 680 131 PaeTec Communications, Inc.
10620 1851 332 177 TVCABLE BOGOTA
17974 1822 509 71 PT TELEKOMUNIKASI INDONESIA
28573 1809 1114 62 NET Servicos de Comunicao S.A
7545 1679 301 88 TPG Internet Pty Ltd
20115 1639 1566 619 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 3363 3205 Windstream Communications Inc
18566 2091 1912 Covad Communications
1785 1906 1775 PaeTec Communications, Inc.
17974 1822 1751 PT TELEKOMUNIKASI INDONESIA
28573 1809 1747 NET Servicos de Comunicao S.A
10620 1851 1674 TVCABLE BOGOTA
7545 1679 1591 TPG Internet Pty Ltd
8402 1593 1577 Corbina telecom
4766 2484 1474 Korea Telecom (KIX)
22773 1581 1467 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 /11:81 /12:234
/13:461 /14:832 /15:1489 /16:12243 /17:6251 /18:10542
/19:20613 /20:29045 /21:30096 /22:40568 /23:38053 /24:212891
/25:1192 /26:1429 /27:783 /28:162 /29:67 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3025 3363 Windstream Communications Inc
6389 2142 3424 bellsouth.net, inc.
18566 2040 2091 Covad Communications
10620 1712 1851 TVCABLE BOGOTA
8402 1571 1593 Corbina telecom
30036 1365 1421 Mediacom Communications Corp
6503 1290 1532 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1309 TEDATA
1785 1072 1906 PaeTec Communications, Inc.

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

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

1:539 2:528 4:10 6:3 8:405 12:2010
13:1 14:607 15:12 16:3 17:5 20:23
23:168 24:1762 27:1271 31:952 32:57 33:2
34:2 36:8 37:423 38:798 40:120 41:3104
42:135 44:3 46:1486 47:3 49:404 50:539
52:13 54:8 55:9 56:3 57:31 58:972
59:491 60:254 61:1205 62:975 63:1990 64:4175
65:2255 66:4476 67:2017 68:1163 69:3177 70:902
71:484 72:1827 74:2614 75:494 76:318 77:946
78:1005 79:487 80:1208 81:905 82:673 83:549
84:483 85:1210 86:411 87:929 88:340 89:1577
90:291 91:4771 92:522 93:1506 94:1501 95:890
96:358 97:315 98:900 99:37 100:7 101:181
103:1014 106:102 107:191 108:271 109:1311 110:753
111:922 112:454 113:605 114:643 115:816 116:927
117:722 118:907 119:1230 120:354 121:692 122:1676
123:1103 124:1381 125:1245 128:563 129:194 130:256
131:619 132:180 133:22 134:245 135:62 136:214
137:176 138:355 139:163 140:490 141:243 142:407
143:392 144:520 145:74 146:488 147:279 148:767
149:306 150:159 151:180 152:464 153:172 154:12
155:396 156:214 157:374 158:176 159:541 160:338
161:260 162:347 163:191 164:582 165:399 166:573
167:468 168:820 169:128 170:860 171:127 172:2
173:1757 174:574 175:437 176:681 177:650 178:1357
180:1196 181:79 182:827 183:289 184:462 185:1
186:2246 187:1054 188:1227 189:1793 190:5546 192:6013
193:5550 194:4659 195:3598 196:1275 197:130 198:3647
199:4538 200:5783 201:1934 202:8523 203:8619 204:4329
205:2493 206:2745 207:2797 208:4057 209:3622 210:2738
211:1477 212:1991 213:1925 214:844 215:104 216:5128
217:1534 218:544 219:317 220:1229 221:558 222:323
223:336

End of report
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