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.

Thursday, May 10, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 11 May, 2012

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

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

BGP routing table entries examined: 407167
Prefixes after maximum aggregation: 173548
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198974
Total ASes present in the Internet Routing Table: 40961
Prefixes per ASN: 9.94
Origin-only ASes present in the Internet Routing Table: 33167
Origin ASes announcing only one prefix: 15644
Transit ASes present in the Internet Routing Table: 5474
Transit-only ASes present in the Internet Routing Table: 140
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: 376
Unregistered ASNs in the Routing Table: 129
Number of 32-bit ASNs allocated by the RIRs: 2685
Number of 32-bit ASNs visible in the Routing Table: 2320
Prefixes from 32-bit ASNs in the Routing Table: 5839
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 109
Number of addresses announced to Internet: 2545952816
Equivalent to 151 /8s, 192 /16s and 40 /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: 173745

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

Prefixes being announced by APNIC Region ASes: 100236
Total APNIC prefixes after maximum aggregation: 32342
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 96690
Unique aggregates announced from the APNIC address blocks: 39849
APNIC Region origin ASes present in the Internet Routing Table: 4690
APNIC Prefixes per ASN: 20.62
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 733
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: 203
Number of APNIC addresses announced to Internet: 644667008
Equivalent to 38 /8s, 108 /16s and 214 /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: 150578
Total ARIN prefixes after maximum aggregation: 76547
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121547
Unique aggregates announced from the ARIN address blocks: 50715
ARIN Region origin ASes present in the Internet Routing Table: 15089
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5740
ARIN Region transit ASes present in the Internet Routing Table: 1593
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: 810226368
Equivalent to 48 /8s, 75 /16s and 18 /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: 100094
Total RIPE prefixes after maximum aggregation: 54161
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92269
Unique aggregates announced from the RIPE address blocks: 58682
RIPE Region origin ASes present in the Internet Routing Table: 16558
RIPE Prefixes per ASN: 5.57
RIPE Region origin ASes announcing only one prefix: 8057
RIPE Region transit ASes present in the Internet Routing Table: 2644
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: 1551
Number of RIPE addresses announced to Internet: 512708808
Equivalent to 30 /8s, 143 /16s and 80 /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: 41296
Total LACNIC prefixes after maximum aggregation: 8272
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 41256
Unique aggregates announced from the LACNIC address blocks: 20464
LACNIC Region origin ASes present in the Internet Routing Table: 1595
LACNIC Prefixes per ASN: 25.87
LACNIC Region origin ASes announcing only one prefix: 438
LACNIC Region transit ASes present in the Internet Routing Table: 301
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 544
Number of LACNIC addresses announced to Internet: 100126088
Equivalent to 5 /8s, 247 /16s and 205 /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: 8934
Total AfriNIC prefixes after maximum aggregation: 2160
AfriNIC Deaggregation factor: 4.14
Prefixes being announced from the AfriNIC address blocks: 7011
Unique aggregates announced from the AfriNIC address blocks: 2239
AfriNIC Region origin ASes present in the Internet Routing Table: 532
AfriNIC Prefixes per ASN: 13.18
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 31769600
Equivalent to 1 /8s, 228 /16s and 196 /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 2539 11114 1039 Korea Telecom (KIX)
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1678 301 85 TPG Internet Pty Ltd
4755 1592 387 161 TATA Communications formerly
9829 1279 1069 30 BSNL National Internet Backbo
7552 1165 1062 11 Vietel Corporation
9583 1155 86 499 Sify Limited
4808 1104 2049 315 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 966 291 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 3415 3807 193 bellsouth.net, inc.
7029 3376 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1898 680 130 PaeTec Communications, Inc.
20115 1636 1566 620 Charter Communications
4323 1607 1044 383 Time Warner Telecom
22773 1596 2911 115 Cox Communications, Inc.
30036 1424 264 754 Mediacom Communications Corp
7018 1250 10038 819 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 1754 544 16 Corbina telecom
34984 690 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 675 670 68 Uni2 Autonomous System
6830 656 2215 427 UPC Distribution Services
20940 656 216 510 Akamai Technologies European
8551 571 360 80 Bezeq International
3320 484 8442 400 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark
8866 435 134 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 1839 1136 57 NET Servicos de Comunicao S.A
6503 1526 418 66 AVANTEL, S.A.
8151 1479 3003 341 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 692 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 1307 958 13 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 456 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 191 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 83 MTN Network Solutions
15706 169 32 6 Sudatel Internet Exchange Aut
29571 158 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 3415 3807 193 bellsouth.net, inc.
7029 3376 986 159 Windstream Communications Inc
4766 2539 11114 1039 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1898 680 130 PaeTec Communications, Inc.
10620 1869 334 175 TVCABLE BOGOTA
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
28573 1839 1136 57 NET Servicos de Comunicao S.A
8402 1754 544 16 Corbina telecom
7545 1678 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 3376 3217 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1869 1796 PT TELEKOMUNIKASI INDONESIA
28573 1839 1782 NET Servicos de Comunicao S.A
1785 1898 1768 PaeTec Communications, Inc.
8402 1754 1738 Corbina telecom
10620 1869 1694 TVCABLE BOGOTA
7545 1678 1593 TPG Internet Pty Ltd
4766 2539 1500 Korea Telecom (KIX)
22773 1596 1481 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
5.33.0.0/16 9158 SONOFON (Autonomous System)
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

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 /14:832 /15:1495 /16:12236 /17:6240 /18:10577
/19:20673 /20:29296 /21:30455 /22:39897 /23:38203 /24:212752
/25:1193 /26:1424 /27:787 /28:166 /29:68 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3033 3376 Windstream Communications Inc
6389 2134 3415 bellsouth.net, inc.
18566 2042 2093 Covad Communications
8402 1732 1754 Corbina telecom
10620 1715 1869 TVCABLE BOGOTA
30036 1365 1424 Mediacom Communications Corp
6503 1284 1526 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1108 1307 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 2:697 4:14 5:1 6:3 8:410
12:1995 13:1 14:610 15:12 16:3 17:5
20:23 23:166 24:1768 27:1298 31:950 32:57
33:2 34:2 36:8 37:439 38:808 40:120
41:3103 42:136 44:3 46:1418 47:3 49:401
50:544 52:13 54:10 55:11 56:3 57:32
58:956 59:509 60:255 61:1284 62:986 63:2055
64:4175 65:2243 66:4468 67:2020 68:1166 69:3173
70:905 71:484 72:1825 74:2589 75:491 76:319
77:948 78:986 79:489 80:1218 81:911 82:667
83:549 84:488 85:1226 86:438 87:915 88:333
89:1693 90:290 91:4805 92:541 93:1466 94:1516
95:935 96:369 97:316 98:881 99:38 100:7
101:187 103:1067 106:103 107:187 108:284 109:1331
110:768 111:916 112:406 113:608 114:631 115:891
116:938 117:714 118:905 119:1237 120:352 121:804
122:1670 123:1101 124:1382 125:1247 128:562 129:194
130:253 131:593 132:180 133:22 134:247 135:62
136:214 137:178 138:334 139:183 140:493 141:242
142:409 143:437 144:527 145:70 146:497 147:283
148:771 149:306 150:158 151:180 152:466 153:172
154:12 155:402 156:219 157:381 158:178 159:545
160:338 161:260 162:347 163:191 164:585 165:385
166:572 167:467 168:848 169:126 170:863 171:130
172:2 173:1745 174:587 175:431 176:617 177:736
178:1359 180:1209 181:82 182:969 183:294 184:485
185:1 186:2268 187:1060 188:1263 189:1786 190:5585
192:6001 193:5289 194:3805 195:3217 196:1282 197:134
198:3649 199:4606 200:5826 201:1928 202:8566 203:8612
204:4334 205:2521 206:2754 207:2797 208:4065 209:3613
210:2753 211:1489 212:2011 213:1933 214:858 215:103
216:5102 217:1539 218:543 219:343 220:1231 221:557
222:322 223:339

End of report
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