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, June 12, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 13 Jun, 2012

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

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

BGP routing table entries examined: 413214
Prefixes after maximum aggregation: 174959
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 201597
Total ASes present in the Internet Routing Table: 41265
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33275
Origin ASes announcing only one prefix: 15665
Transit ASes present in the Internet Routing Table: 5529
Transit-only ASes present in the Internet Routing Table: 145
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: 407
Unregistered ASNs in the Routing Table: 135
Number of 32-bit ASNs allocated by the RIRs: 2825
Number of 32-bit ASNs visible in the Routing Table: 2461
Prefixes from 32-bit ASNs in the Routing Table: 6266
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 191
Number of addresses announced to Internet: 2561965356
Equivalent to 152 /8s, 180 /16s and 125 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
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: 143786

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

Prefixes being announced by APNIC Region ASes: 100714
Total APNIC prefixes after maximum aggregation: 32616
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101121
Unique aggregates announced from the APNIC address blocks: 41769
APNIC Region origin ASes present in the Internet Routing Table: 4710
APNIC Prefixes per ASN: 21.47
APNIC Region origin ASes announcing only one prefix: 1253
APNIC Region transit ASes present in the Internet Routing Table: 742
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 225
Number of APNIC addresses announced to Internet: 702300288
Equivalent to 41 /8s, 220 /16s and 64 /24s
Percentage of available APNIC address space announced: 82.1

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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, 150/8, 153/8,
163/8, 171/8, 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: 151668
Total ARIN prefixes after maximum aggregation: 77142
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152604
Unique aggregates announced from the ARIN address blocks: 68021
ARIN Region origin ASes present in the Internet Routing Table: 15144
ARIN Prefixes per ASN: 10.08
ARIN Region origin ASes announcing only one prefix: 5744
ARIN Region transit ASes present in the Internet Routing Table: 1600
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: 1078963072
Equivalent to 64 /8s, 79 /16s and 171 /24s
Percentage of available ARIN address space announced: 57.1

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, 128/8,
129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8,
137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8,
146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8,
157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8,
165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8,
173/8, 174/8, 184/8, 192/8, 198/8, 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: 103146
Total RIPE prefixes after maximum aggregation: 54668
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105177
Unique aggregates announced from the RIPE address blocks: 66602
RIPE Region origin ASes present in the Internet Routing Table: 16620
RIPE Prefixes per ASN: 6.33
RIPE Region origin ASes announcing only one prefix: 8066
RIPE Region transit ASes present in the Internet Routing Table: 2663
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: 1630
Number of RIPE addresses announced to Internet: 630444420
Equivalent to 37 /8s, 147 /16s and 209 /24s
Percentage of available RIPE address space announced: 91.7

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
59392-61439, 196608-199679
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,
141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 41927
Total LACNIC prefixes after maximum aggregation: 8306
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 44364
Unique aggregates announced from the LACNIC address blocks: 21794
LACNIC Region origin ASes present in the Internet Routing Table: 1603
LACNIC Prefixes per ASN: 27.68
LACNIC Region origin ASes announcing only one prefix: 436
LACNIC Region transit ASes present in the Internet Routing Table: 309
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 584
Number of LACNIC addresses announced to Internet: 109925544
Equivalent to 6 /8s, 141 /16s and 84 /24s
Percentage of available LACNIC address space announced: 65.5

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,
191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9309
Total AfriNIC prefixes after maximum aggregation: 2163
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 9757
Unique aggregates announced from the AfriNIC address blocks: 3273
AfriNIC Region origin ASes present in the Internet Routing Table: 546
AfriNIC Prefixes per ASN: 17.87
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 39792128
Equivalent to 2 /8s, 95 /16s and 46 /24s
Percentage of available AfriNIC address space announced: 39.5

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2658 11114 1148 Korea Telecom (KIX)
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
7545 1681 301 85 TPG Internet Pty Ltd
4755 1592 385 155 TATA Communications formerly
9829 1300 1085 28 BSNL National Internet Backbo
9583 1175 87 502 Sify Limited
7552 1158 1062 11 Vietel Corporation
4808 1105 2050 315 CNCGROUP IP network: China169
24560 1029 385 163 Bharti Airtel Ltd., Telemedia
9498 966 291 64 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 3408 3791 192 bellsouth.net, inc.
7029 3248 986 159 Windstream Communications Inc
18566 2091 382 181 Covad Communications
1785 1919 681 131 PaeTec Communications, Inc.
22773 1646 2911 121 Cox Communications, Inc.
20115 1643 1570 613 Charter Communications
4323 1574 1043 385 Time Warner Telecom
30036 1428 265 754 Mediacom Communications Corp
7018 1225 10013 824 AT&T WorldNet Services
11492 1189 216 356 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 1718 544 16 Corbina telecom
2118 1226 97 14 EUnet/RELCOM Autonomous Syste
12479 727 708 86 Uni2 Autonomous System
34984 708 188 171 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
20940 660 219 514 Akamai Technologies European
6830 658 2217 427 UPC Distribution Services
8551 576 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 474 2108 408 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 1932 342 205 TVCABLE BOGOTA
28573 1927 1184 48 NET Servicos de Comunicao S.A
6503 1527 418 65 AVANTEL, S.A.
8151 1486 3067 336 UniNet S.A. de C.V.
7303 1438 901 194 Telecom Argentina Stet-France
26615 902 760 31 Tim Brasil S.A.
27947 704 73 93 Telconet S.A
11172 644 91 73 Servicios Alestra S.A de C.V
3816 584 247 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 1294 958 13 TEDATA
24863 854 274 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 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 170 664 87 MTN Network Solutions
29571 157 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 3408 3791 192 bellsouth.net, inc.
7029 3248 986 159 Windstream Communications Inc
4766 2658 11114 1148 Korea Telecom (KIX)
18566 2091 382 181 Covad Communications
10620 1932 342 205 TVCABLE BOGOTA
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
28573 1927 1184 48 NET Servicos de Comunicao S.A
1785 1919 681 131 PaeTec Communications, Inc.
8402 1718 544 16 Corbina telecom
7545 1681 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 3248 3089 Windstream Communications Inc
18566 2091 1910 Covad Communications
28573 1927 1879 NET Servicos de Comunicao S.A
17974 1928 1847 PT TELEKOMUNIKASI INDONESIA
1785 1919 1788 PaeTec Communications, Inc.
10620 1932 1727 TVCABLE BOGOTA
8402 1718 1702 Corbina telecom
7545 1681 1596 TPG Internet Pty Ltd
22773 1646 1525 Cox Communications, Inc.
4766 2658 1510 Korea Telecom (KIX)

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
5.63.0.0/21 30981 Horizon Satellite Services FZ
5.63.64.0/18 9198 Kazakhtelecom Data Network Ad
5.76.0.0/16 9198 Kazakhtelecom Data Network Ad
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

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 /9:13 /10:28 /11:82 /12:236
/13:461 /14:831 /15:1505 /16:12304 /17:6296 /18:10648
/19:20780 /20:29546 /21:31115 /22:40730 /23:38533 /24:216295
/25:1232 /26:1442 /27:839 /28:171 /29:68 /30:18
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2646 3248 Windstream Communications Inc
18566 2040 2091 Covad Communications
6389 1878 3408 bellsouth.net, inc.
8402 1410 1718 Corbina telecom
30036 1368 1428 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1078 1646 Cox Communications, Inc.
8452 1067 1294 TEDATA
6503 1061 1527 AVANTEL, S.A.
1785 1032 1919 PaeTec Communications, Inc.

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

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

1:556 2:744 3:1 4:13 5:50 6:3
8:426 12:2015 13:1 14:615 15:12 16:3
17:5 20:23 23:178 24:1778 27:1307 31:978
32:56 33:2 34:2 36:9 37:672 38:811
40:127 41:3152 42:135 44:3 46:1422 47:2
49:398 50:560 52:13 54:12 55:9 56:1
57:34 58:962 59:499 60:259 61:1210 62:1008
63:2010 64:4234 65:2253 66:4451 67:2009 68:1160
69:3176 70:950 71:507 72:1824 74:2594 75:473
76:326 77:954 78:980 79:490 80:1219 81:940
82:665 83:543 84:507 85:1189 86:429 87:921
88:337 89:1699 90:293 91:4921 92:557 93:1351
94:1601 95:1221 96:368 97:315 98:898 99:38
100:7 101:259 103:1137 106:103 107:186 108:331
109:1378 110:778 111:924 112:418 113:615 114:631
115:815 116:952 117:721 118:923 119:1228 120:358
121:694 122:1668 123:1103 124:1393 125:1261 128:567
129:197 130:249 131:631 132:289 133:22 134:243
135:61 136:215 137:241 138:358 139:187 140:493
141:251 142:415 143:373 144:532 145:72 146:512
147:296 148:775 149:312 150:162 151:176 152:469
153:174 154:14 155:445 156:222 157:382 158:188
159:579 160:348 161:268 162:347 163:190 164:637
165:404 166:590 167:473 168:862 169:127 170:881
171:136 172:4 173:1773 174:603 175:431 176:541
177:807 178:1420 180:1240 181:91 182:1051 183:228
184:530 185:1 186:2332 187:1119 188:1339 189:1840
190:5604 192:5999 193:5516 194:4538 195:3394 196:1227
197:150 198:3661 199:4770 200:5884 201:1952 202:8629
203:8545 204:4343 205:2534 206:2772 207:2798 208:4018
209:3614 210:2777 211:1549 212:2035 213:1931 214:877
215:90 216:5101 217:1570 218:553 219:312 220:1236
221:570 222:317 223:362

End of report
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