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.

Wednesday, May 9, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 406493
Prefixes after maximum aggregation: 173373
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198823
Total ASes present in the Internet Routing Table: 40928
Prefixes per ASN: 9.93
Origin-only ASes present in the Internet Routing Table: 33158
Origin ASes announcing only one prefix: 15645
Transit ASes present in the Internet Routing Table: 5467
Transit-only ASes present in the Internet Routing Table: 141
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: 373
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2678
Number of 32-bit ASNs visible in the Routing Table: 2303
Prefixes from 32-bit ASNs in the Routing Table: 5810
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2545593120
Equivalent to 151 /8s, 186 /16s and 171 /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: 92.5
Total number of prefixes smaller than registry allocations: 173241

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

Prefixes being announced by APNIC Region ASes: 100176
Total APNIC prefixes after maximum aggregation: 32304
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 96626
Unique aggregates announced from the APNIC address blocks: 39820
APNIC Region origin ASes present in the Internet Routing Table: 4685
APNIC Prefixes per ASN: 20.62
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 729
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: 201
Number of APNIC addresses announced to Internet: 644671104
Equivalent to 38 /8s, 108 /16s and 230 /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: 150491
Total ARIN prefixes after maximum aggregation: 76531
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121506
Unique aggregates announced from the ARIN address blocks: 50721
ARIN Region origin ASes present in the Internet Routing Table: 15084
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5743
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: 810198208
Equivalent to 48 /8s, 74 /16s and 164 /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: 99847
Total RIPE prefixes after maximum aggregation: 54126
RIPE Deaggregation factor: 1.84
Prefixes being announced from the RIPE address blocks: 92053
Unique aggregates announced from the RIPE address blocks: 58596
RIPE Region origin ASes present in the Internet Routing Table: 16552
RIPE Prefixes per ASN: 5.56
RIPE Region origin ASes announcing only one prefix: 8054
RIPE Region transit ASes present in the Internet Routing Table: 2642
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: 1541
Number of RIPE addresses announced to Internet: 512396992
Equivalent to 30 /8s, 138 /16s and 142 /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: 41078
Total LACNIC prefixes after maximum aggregation: 8207
LACNIC Deaggregation factor: 5.01
Prefixes being announced from the LACNIC address blocks: 41051
Unique aggregates announced from the LACNIC address blocks: 20470
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 25.72
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 300
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: 539
Number of LACNIC addresses announced to Internet: 100096384
Equivalent to 5 /8s, 247 /16s and 89 /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: 8900
Total AfriNIC prefixes after maximum aggregation: 2139
AfriNIC Deaggregation factor: 4.16
Prefixes being announced from the AfriNIC address blocks: 6970
Unique aggregates announced from the AfriNIC address blocks: 2219
AfriNIC Region origin ASes present in the Internet Routing Table: 530
AfriNIC Prefixes per ASN: 13.15
AfriNIC Region origin ASes announcing only one prefix: 166
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: 31764480
Equivalent to 1 /8s, 228 /16s and 176 /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 2511 11113 1014 Korea Telecom (KIX)
17974 1866 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 86 TPG Internet Pty Ltd
4755 1592 387 161 TATA Communications formerly
9829 1277 1069 30 BSNL National Internet Backbo
7552 1165 1062 11 Vietel Corporation
9583 1150 85 494 Sify Limited
4808 1104 2049 315 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 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 3374 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1896 680 130 PaeTec Communications, Inc.
20115 1639 1565 618 Charter Communications
4323 1607 1044 383 Time Warner Telecom
22773 1592 2911 115 Cox Communications, Inc.
30036 1428 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 1643 544 16 Corbina telecom
34984 689 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
12479 674 670 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 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 1862 333 172 TVCABLE BOGOTA
28573 1842 1136 57 NET Servicos de Comunicao S.A
6503 1524 418 66 AVANTEL, S.A.
7303 1371 837 188 Telecom Argentina Stet-France
8151 1357 3001 340 UniNet S.A. de C.V.
26615 903 761 33 Tim Brasil S.A.
27947 669 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 575 243 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 490 649 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 3374 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 1866 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1862 333 172 TVCABLE BOGOTA
28573 1842 1136 57 NET Servicos de Comunicao S.A
7545 1679 301 86 TPG Internet Pty Ltd
8402 1643 544 16 Corbina telecom

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 3374 3215 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1866 1793 PT TELEKOMUNIKASI INDONESIA
28573 1842 1785 NET Servicos de Comunicao S.A
1785 1896 1766 PaeTec Communications, Inc.
10620 1862 1690 TVCABLE BOGOTA
8402 1643 1627 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
5.28.192.0/18 31400 SpeedNetwork IP Backbone
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 /15:1497 /16:12237 /17:6247 /18:10558
/19:20658 /20:29284 /21:30434 /22:39817 /23:38138 /24:212504
/25:1199 /26:1429 /27:785 /28:12 /29:7 /30:3
/31:0 /32:16

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

ASN No of nets Total ann. Description
7029 3031 3374 Windstream Communications Inc
6389 2138 3420 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1715 1862 TVCABLE BOGOTA
8402 1621 1643 Corbina telecom
30036 1372 1428 Mediacom Communications Corp
6503 1282 1524 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)
----------------------------------------------

1:537 2:635 4:14 5:1 6:3 8:408
12:1998 13:1 14:611 15:12 16:3 17:5
20:23 23:166 24:1760 27:1298 31:946 32:57
33:2 34:2 36:8 37:436 38:807 40:120
41:3059 42:136 44:3 46:1422 47:3 49:415
50:548 52:13 54:10 55:12 56:3 57:32
58:960 59:509 60:255 61:1279 62:985 63:2054
64:4173 65:2243 66:4462 67:2016 68:1167 69:3179
70:905 71:485 72:1827 74:2588 75:492 76:318
77:947 78:985 79:489 80:1218 81:910 82:666
83:549 84:487 85:1225 86:437 87:918 88:333
89:1692 90:291 91:4793 92:541 93:1465 94:1514
95:888 96:369 97:316 98:871 99:38 100:7
101:187 103:1046 106:103 107:187 108:281 109:1328
110:768 111:917 112:406 113:611 114:632 115:890
116:928 117:714 118:907 119:1235 120:353 121:805
122:1671 123:1103 124:1380 125:1247 128:560 129:194
130:253 131:589 132:178 133:22 134:247 135:62
136:214 137:175 138:332 139:183 140:490 141:243
142:410 143:436 144:519 145:70 146:501 147:289
148:769 149:306 150:158 151:180 152:466 153:172
154:12 155:400 156:219 157:381 158:178 159:545
160:338 161:261 162:347 163:191 164:586 165:385
166:572 167:467 168:847 169:126 170:862 171:130
172:2 173:1756 174:583 175:431 176:617 177:731
178:1356 180:1214 181:82 182:967 183:294 184:484
185:1 186:2260 187:1072 188:1247 189:1791 190:5586
192:5998 193:5295 194:3800 195:3201 196:1274 197:130
198:3645 199:4606 200:5850 201:1935 202:8579 203:8600
204:4336 205:2516 206:2735 207:2797 208:4073 209:3614
210:2747 211:1480 212:2020 213:1933 214:864 215:103
216:5099 217:1547 218:542 219:342 220:1233 221:557
222:322 223:338

End of report
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