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 29, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 412049
Prefixes after maximum aggregation: 174348
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 200387
Total ASes present in the Internet Routing Table: 41145
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33239
Origin ASes announcing only one prefix: 15651
Transit ASes present in the Internet Routing Table: 5494
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: 28
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 384
Unregistered ASNs in the Routing Table: 140
Number of 32-bit ASNs allocated by the RIRs: 2761
Number of 32-bit ASNs visible in the Routing Table: 2412
Prefixes from 32-bit ASNs in the Routing Table: 6135
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 111
Number of addresses announced to Internet: 2553884848
Equivalent to 152 /8s, 57 /16s and 48 /24s
Percentage of available address space announced: 68.9
Percentage of allocated address space announced: 69.0
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 175770

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

Prefixes being announced by APNIC Region ASes: 100557
Total APNIC prefixes after maximum aggregation: 32480
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 97001
Unique aggregates announced from the APNIC address blocks: 39973
APNIC Region origin ASes present in the Internet Routing Table: 4695
APNIC Prefixes per ASN: 20.66
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 735
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 223
Number of APNIC addresses announced to Internet: 646582336
Equivalent to 38 /8s, 138 /16s and 16 /24s
Percentage of available APNIC address space announced: 82.0

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: 151466
Total ARIN prefixes after maximum aggregation: 76830
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121873
Unique aggregates announced from the ARIN address blocks: 51248
ARIN Region origin ASes present in the Internet Routing Table: 15130
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5745
ARIN Region transit ASes present in the Internet Routing Table: 1595
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: 812484288
Equivalent to 48 /8s, 109 /16s and 134 /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: 102642
Total RIPE prefixes after maximum aggregation: 54531
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94633
Unique aggregates announced from the RIPE address blocks: 59255
RIPE Region origin ASes present in the Internet Routing Table: 16599
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 8060
RIPE Region transit ASes present in the Internet Routing Table: 2654
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: 1598
Number of RIPE addresses announced to Internet: 514713736
Equivalent to 30 /8s, 173 /16s and 232 /24s
Percentage of available RIPE address space announced: 82.9

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: 41687
Total LACNIC prefixes after maximum aggregation: 8266
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41830
Unique aggregates announced from the LACNIC address blocks: 20506
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 26.21
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 305
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 569
Number of LACNIC addresses announced to Internet: 101432200
Equivalent to 6 /8s, 11 /16s and 187 /24s
Percentage of available LACNIC address space announced: 67.2

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: 9374
Total AfriNIC prefixes after maximum aggregation: 2177
AfriNIC Deaggregation factor: 4.31
Prefixes being announced from the AfriNIC address blocks: 7420
Unique aggregates announced from the AfriNIC address blocks: 2197
AfriNIC Region origin ASes present in the Internet Routing Table: 543
AfriNIC Prefixes per ASN: 13.66
AfriNIC Region origin ASes announcing only one prefix: 168
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: 31746560
Equivalent to 1 /8s, 228 /16s and 106 /24s
Percentage of available AfriNIC address space announced: 47.3

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 2636 11113 1121 Korea Telecom (KIX)
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1667 301 85 TPG Internet Pty Ltd
4755 1577 386 156 TATA Communications formerly
9829 1298 1085 28 BSNL National Internet Backbo
7552 1172 1062 11 Vietel Corporation
9583 1156 87 503 Sify Limited
4808 1107 2050 317 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 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 3411 3807 193 bellsouth.net, inc.
7029 3336 986 159 Windstream Communications Inc
18566 2093 382 181 Covad Communications
1785 1909 681 131 PaeTec Communications, Inc.
20115 1644 1569 619 Charter Communications
22773 1610 2911 121 Cox Communications, Inc.
4323 1567 1040 380 Time Warner Telecom
30036 1409 261 757 Mediacom Communications Corp
7018 1224 10015 821 AT&T WorldNet Services
7011 1188 317 681 Citizens Utilities

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 1748 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 698 188 172 BILISIM TELEKOM
12479 694 678 70 Uni2 Autonomous System
31148 682 37 9 FreeNet ISP
20940 659 216 514 Akamai Technologies European
6830 655 2215 426 UPC Distribution Services
8551 580 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 471 2108 406 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 1920 340 201 TVCABLE BOGOTA
28573 1880 1180 57 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1480 3039 331 UniNet S.A. de C.V.
7303 1435 901 191 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 689 73 94 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
3816 585 247 89 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET 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
8452 1370 958 13 TEDATA
24863 846 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 204 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 171 666 83 MTN Network Solutions
15706 165 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 3411 3807 193 bellsouth.net, inc.
7029 3336 986 159 Windstream Communications Inc
4766 2636 11113 1121 Korea Telecom (KIX)
18566 2093 382 181 Covad Communications
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
10620 1920 340 201 TVCABLE BOGOTA
1785 1909 681 131 PaeTec Communications, Inc.
28573 1880 1180 57 NET Servicos de Comunicao S.A
8402 1748 544 16 Corbina telecom
7545 1667 301 85 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
7029 3336 3177 Windstream Communications Inc
18566 2093 1912 Covad Communications
17974 1924 1844 PT TELEKOMUNIKASI INDONESIA
28573 1880 1823 NET Servicos de Comunicao S.A
1785 1909 1778 PaeTec Communications, Inc.
8402 1748 1732 Corbina telecom
10620 1920 1719 TVCABLE BOGOTA
7545 1667 1582 TPG Internet Pty Ltd
4766 2636 1515 Korea Telecom (KIX)
22773 1610 1489 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
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
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
14764 UNALLOCATED 12.108.237.0/24 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
128.0.0.0/21 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
5.45.176.0/21 29141 Bradler & Krantz, Bochum, Ger
5.53.32.0/19 30783 Rased Maral Ava Jonoob JSC
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

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
/13:462 /14:832 /15:1504 /16:12298 /17:6298 /18:10622
/19:20797 /20:29460 /21:30876 /22:40609 /23:38445 /24:215698
/25:1219 /26:1454 /27:824 /28:169 /29:67 /30:17
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2996 3336 Windstream Communications Inc
6389 2130 3411 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1734 1920 TVCABLE BOGOTA
8402 1726 1748 Corbina telecom
30036 1350 1409 Mediacom Communications Corp
6503 1288 1533 AVANTEL, S.A.
8452 1171 1370 TEDATA
11492 1150 1186 Cable One
7011 1073 1188 Citizens Utilities

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

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

1:555 2:753 4:13 5:38 6:3 8:419
12:2000 13:1 14:620 15:12 16:3 17:5
20:23 23:173 24:1775 27:1313 31:979 32:57
33:2 34:2 36:8 37:633 38:809 40:121
41:3229 42:139 44:3 46:1430 47:3 49:449
50:551 52:13 54:12 55:8 56:3 57:33
58:957 59:498 60:254 61:1218 62:1002 63:2010
64:4240 65:2249 66:4474 67:2006 68:1159 69:3195
70:933 71:494 72:1824 74:2600 75:494 76:328
77:951 78:982 79:492 80:1223 81:939 82:661
83:544 84:495 85:1215 86:440 87:906 88:346
89:1718 90:292 91:4860 92:549 93:1371 94:1557
95:1171 96:362 97:313 98:864 99:38 100:7
101:208 103:1109 106:104 107:185 108:312 109:1338
110:754 111:926 112:411 113:605 114:630 115:845
116:938 117:724 118:905 119:1238 120:354 121:698
122:1666 123:1104 124:1390 125:1247 128:554 129:195
130:246 131:631 132:287 133:22 134:248 135:62
136:215 137:241 138:359 139:186 140:496 141:251
142:415 143:556 144:536 145:71 146:504 147:284
148:774 149:306 150:192 151:175 152:469 153:172
154:12 155:402 156:222 157:381 158:184 159:557
160:341 161:265 162:342 163:190 164:605 165:398
166:593 167:468 168:863 169:126 170:876 171:132
172:2 173:1755 174:581 175:432 176:536 177:814
178:1381 180:1226 181:88 182:1040 183:227 184:498
185:1 186:2306 187:1100 188:1294 189:1816 190:5546
192:6005 193:5566 194:4527 195:3424 196:1214 197:149
198:3660 199:4668 200:5870 201:1944 202:8616 203:8574
204:4339 205:2526 206:2766 207:2804 208:4059 209:3622
210:2765 211:1541 212:2035 213:1931 214:846 215:96
216:5096 217:1554 218:551 219:315 220:1239 221:563
222:315 223:359

End of report
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