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.

Monday, June 18, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 19 Jun, 2012

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

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

BGP routing table entries examined: 414047
Prefixes after maximum aggregation: 175277
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 202140
Total ASes present in the Internet Routing Table: 41330
Prefixes per ASN: 10.02
Origin-only ASes present in the Internet Routing Table: 33319
Origin ASes announcing only one prefix: 15664
Transit ASes present in the Internet Routing Table: 5521
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: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 416
Unregistered ASNs in the Routing Table: 141
Number of 32-bit ASNs allocated by the RIRs: 2854
Number of 32-bit ASNs visible in the Routing Table: 2490
Prefixes from 32-bit ASNs in the Routing Table: 6338
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 328
Number of addresses announced to Internet: 2567024428
Equivalent to 153 /8s, 1 /16s and 175 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.3
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.9
Total number of prefixes smaller than registry allocations: 143908

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

Prefixes being announced by APNIC Region ASes: 100874
Total APNIC prefixes after maximum aggregation: 32677
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101305
Unique aggregates announced from the APNIC address blocks: 41860
APNIC Region origin ASes present in the Internet Routing Table: 4712
APNIC Prefixes per ASN: 21.50
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 746
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: 229
Number of APNIC addresses announced to Internet: 703225728
Equivalent to 41 /8s, 234 /16s and 95 /24s
Percentage of available APNIC address space announced: 82.2

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: 151999
Total ARIN prefixes after maximum aggregation: 77204
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152949
Unique aggregates announced from the ARIN address blocks: 68140
ARIN Region origin ASes present in the Internet Routing Table: 15167
ARIN Prefixes per ASN: 10.08
ARIN Region origin ASes announcing only one prefix: 5747
ARIN Region transit ASes present in the Internet Routing Table: 1596
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: 16
Number of ARIN addresses announced to Internet: 1081330816
Equivalent to 64 /8s, 115 /16s and 204 /24s
Percentage of available ARIN address space announced: 57.2

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: 103505
Total RIPE prefixes after maximum aggregation: 54816
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105427
Unique aggregates announced from the RIPE address blocks: 66720
RIPE Region origin ASes present in the Internet Routing Table: 16633
RIPE Prefixes per ASN: 6.34
RIPE Region origin ASes announcing only one prefix: 8064
RIPE Region transit ASes present in the Internet Routing Table: 2669
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: 1649
Number of RIPE addresses announced to Internet: 630905732
Equivalent to 37 /8s, 154 /16s and 219 /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: 42150
Total LACNIC prefixes after maximum aggregation: 8350
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 44599
Unique aggregates announced from the LACNIC address blocks: 21853
LACNIC Region origin ASes present in the Internet Routing Table: 1604
LACNIC Prefixes per ASN: 27.80
LACNIC Region origin ASes announcing only one prefix: 436
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: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 591
Number of LACNIC addresses announced to Internet: 110644648
Equivalent to 6 /8s, 152 /16s and 77 /24s
Percentage of available LACNIC address space announced: 65.9

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: 8993
Total AfriNIC prefixes after maximum aggregation: 2166
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 9439
Unique aggregates announced from the AfriNIC address blocks: 3269
AfriNIC Region origin ASes present in the Internet Routing Table: 548
AfriNIC Prefixes per ASN: 17.22
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: 4.6
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: 40445184
Equivalent to 2 /8s, 105 /16s and 37 /24s
Percentage of available AfriNIC address space announced: 40.2

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 2704 11116 1187 Korea Telecom (KIX)
17974 1941 531 82 PT TELEKOMUNIKASI INDONESIA
7545 1684 301 86 TPG Internet Pty Ltd
4755 1594 386 155 TATA Communications formerly
9829 1300 1085 28 BSNL National Internet Backbo
9583 1183 89 509 Sify Limited
4808 1106 2053 314 CNCGROUP IP network: China169
7552 1094 1062 11 Vietel Corporation
24560 1034 385 165 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 3405 3791 191 bellsouth.net, inc.
7029 3299 986 159 Windstream Communications Inc
18566 2090 382 180 Covad Communications
1785 1920 681 132 PaeTec Communications, Inc.
22773 1650 2911 121 Cox Communications, Inc.
20115 1643 1570 613 Charter Communications
4323 1574 1043 385 Time Warner Telecom
30036 1440 267 746 Mediacom Communications Corp
7018 1227 10014 825 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 1825 544 16 Corbina telecom
2118 1239 97 14 EUnet/RELCOM Autonomous Syste
12479 740 712 89 Uni2 Autonomous System
34984 710 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
20940 678 222 529 Akamai Technologies European
6830 661 2219 427 UPC Distribution Services
8551 575 364 61 Bezeq International
3320 490 8442 403 Deutsche Telekom AG
3292 469 2108 403 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 1967 342 205 TVCABLE BOGOTA
28573 1930 1189 52 NET Servicos de Comunicao S.A
6503 1527 418 65 AVANTEL, S.A.
8151 1487 3067 336 UniNet S.A. de C.V.
7303 1440 901 195 Telecom Argentina Stet-France
26615 900 696 35 Tim Brasil S.A.
27947 705 73 93 Telconet S.A
11172 646 91 74 Servicios Alestra S.A de C.V
3816 584 245 92 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 994 958 13 TEDATA
24863 858 274 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
12258 197 28 62 Vodacom Internet Company
33776 184 11 21 Starcomms Nigeria Limited
16637 172 664 87 MTN Network Solutions
29975 168 572 20 Vodacom
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 3405 3791 191 bellsouth.net, inc.
7029 3299 986 159 Windstream Communications Inc
4766 2704 11116 1187 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
10620 1967 342 205 TVCABLE BOGOTA
17974 1941 531 82 PT TELEKOMUNIKASI INDONESIA
28573 1930 1189 52 NET Servicos de Comunicao S.A
1785 1920 681 132 PaeTec Communications, Inc.
8402 1825 544 16 Corbina telecom
7545 1684 301 86 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 3299 3140 Windstream Communications Inc
18566 2090 1910 Covad Communications
28573 1930 1878 NET Servicos de Comunicao S.A
17974 1941 1859 PT TELEKOMUNIKASI INDONESIA
8402 1825 1809 Corbina telecom
1785 1920 1788 PaeTec Communications, Inc.
10620 1967 1762 TVCABLE BOGOTA
7545 1684 1598 TPG Internet Pty Ltd
22773 1650 1529 Cox Communications, Inc.
4766 2704 1517 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
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
41.188.64.0/18 29544 Mauritanian Telecommunication

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 /11:83 /12:236
/13:462 /14:835 /15:1506 /16:12301 /17:6307 /18:10663
/19:20802 /20:29546 /21:31175 /22:40855 /23:38692 /24:216687
/25:1238 /26:1461 /27:861 /28:171 /29:66 /30:18
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2680 3299 Windstream Communications Inc
18566 2039 2090 Covad Communications
6389 1876 3405 bellsouth.net, inc.
8402 1522 1825 Corbina telecom
30036 1380 1440 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1082 1650 Cox Communications, Inc.
6503 1061 1527 AVANTEL, S.A.
1785 1033 1920 PaeTec Communications, Inc.
7011 926 1187 Citizens Utilities

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

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

1:561 2:789 3:1 4:13 5:63 6:3
8:426 12:2016 13:1 14:626 15:12 16:3
17:5 20:24 23:183 24:1777 27:1311 31:990
32:55 33:2 34:2 36:9 37:607 38:813
40:127 41:2859 42:136 44:3 46:1423 47:2
49:396 50:562 52:13 54:12 55:7 56:1
57:34 58:973 59:499 60:259 61:1221 62:1001
63:2041 64:4233 65:2249 66:4441 67:2010 68:1158
69:3174 70:978 71:509 72:1826 74:2598 75:477
76:329 77:945 78:973 79:492 80:1215 81:946
82:656 83:539 84:505 85:1190 86:417 87:937
88:339 89:1724 90:293 91:4937 92:572 93:1454
94:1590 95:1220 96:369 97:316 98:887 99:38
100:17 101:247 103:1178 106:103 107:186 108:335
109:1390 110:785 111:927 112:419 113:618 114:636
115:850 116:948 117:732 118:905 119:1239 120:349
121:694 122:1672 123:1098 124:1396 125:1254 128:561
129:197 130:251 131:633 132:283 133:22 134:244
135:61 136:214 137:239 138:333 139:191 140:491
141:253 142:416 143:377 144:527 145:73 146:512
147:293 148:775 149:314 150:166 151:183 152:472
153:174 154:16 155:445 156:223 157:382 158:188
159:606 160:345 161:268 162:352 163:188 164:639
165:413 166:588 167:473 168:913 169:127 170:884
171:138 172:4 173:1781 174:600 175:433 176:545
177:807 178:1466 180:1272 181:97 182:1018 183:228
184:536 185:1 186:2337 187:1119 188:1348 189:1845
190:5635 192:6010 193:5530 194:4541 195:3407 196:1203
197:155 198:3665 199:4791 200:5909 201:1962 202:8647
203:8554 204:4348 205:2540 206:2803 207:2797 208:4035
209:3607 210:2786 211:1552 212:2032 213:1932 214:874
215:88 216:5102 217:1575 218:553 219:313 220:1245
221:574 222:316 223:351

End of report
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