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, April 2, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 03 Apr, 2013

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

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

BGP routing table entries examined: 448397
Prefixes after maximum aggregation: 183838
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 221230
Total ASes present in the Internet Routing Table: 43697
Prefixes per ASN: 10.26
Origin-only ASes present in the Internet Routing Table: 34390
Origin ASes announcing only one prefix: 16046
Transit ASes present in the Internet Routing Table: 5790
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 367
Unregistered ASNs in the Routing Table: 134
Number of 32-bit ASNs allocated by the RIRs: 4673
Number of 32-bit ASNs visible in the Routing Table: 3517
Prefixes from 32-bit ASNs in the Routing Table: 10270
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 210
Number of addresses announced to Internet: 2627147884
Equivalent to 156 /8s, 151 /16s and 24 /24s
Percentage of available address space announced: 71.0
Percentage of allocated address space announced: 71.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.4
Total number of prefixes smaller than registry allocations: 158532

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

Prefixes being announced by APNIC Region ASes: 107820
Total APNIC prefixes after maximum aggregation: 33279
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108998
Unique aggregates announced from the APNIC address blocks: 44315
APNIC Region origin ASes present in the Internet Routing Table: 4818
APNIC Prefixes per ASN: 22.62
APNIC Region origin ASes announcing only one prefix: 1223
APNIC Region transit ASes present in the Internet Routing Table: 818
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 476
Number of APNIC addresses announced to Internet: 720241888
Equivalent to 42 /8s, 238 /16s and 4 /24s
Percentage of available APNIC address space announced: 84.2

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: 157397
Total ARIN prefixes after maximum aggregation: 79413
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 158089
Unique aggregates announced from the ARIN address blocks: 72273
ARIN Region origin ASes present in the Internet Routing Table: 15590
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5921
ARIN Region transit ASes present in the Internet Routing Table: 1609
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 1080012928
Equivalent to 64 /8s, 95 /16s and 176 /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: 115177
Total RIPE prefixes after maximum aggregation: 59208
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 118895
Unique aggregates announced from the RIPE address blocks: 76741
RIPE Region origin ASes present in the Internet Routing Table: 17111
RIPE Prefixes per ASN: 6.95
RIPE Region origin ASes announcing only one prefix: 8155
RIPE Region transit ASes present in the Internet Routing Table: 2799
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2263
Number of RIPE addresses announced to Internet: 654741220
Equivalent to 39 /8s, 6 /16s and 142 /24s
Percentage of available RIPE address space announced: 95.2

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: 47565
Total LACNIC prefixes after maximum aggregation: 9404
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 51567
Unique aggregates announced from the LACNIC address blocks: 23903
LACNIC Region origin ASes present in the Internet Routing Table: 1882
LACNIC Prefixes per ASN: 27.40
LACNIC Region origin ASes announcing only one prefix: 559
LACNIC Region transit ASes present in the Internet Routing Table: 347
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 753
Number of LACNIC addresses announced to Internet: 125595944
Equivalent to 7 /8s, 124 /16s and 113 /24s
Percentage of available LACNIC address space announced: 74.9

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: 10036
Total AfriNIC prefixes after maximum aggregation: 2486
AfriNIC Deaggregation factor: 4.04
Prefixes being announced from the AfriNIC address blocks: 10638
Unique aggregates announced from the AfriNIC address blocks: 3803
AfriNIC Region origin ASes present in the Internet Routing Table: 612
AfriNIC Prefixes per ASN: 17.38
AfriNIC Region origin ASes announcing only one prefix: 188
AfriNIC Region transit ASes present in the Internet Routing Table: 130
Average AfriNIC Region AS path length visible: 4.9
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 46199040
Equivalent to 2 /8s, 192 /16s and 241 /24s
Percentage of available AfriNIC address space announced: 45.9

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 2951 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1863 302 95 TPG Internet Pty Ltd
4755 1731 392 198 TATA Communications formerly
9829 1465 1205 40 BSNL National Internet Backbo
9583 1280 97 530 Sify Limited
7552 1168 1066 12 Vietel Corporation
4808 1122 2109 326 CNCGROUP IP network: China169
9498 1061 310 73 BHARTI Airtel Ltd.
24560 1058 385 164 Bharti Airtel Ltd., Telemedia

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 3030 3694 86 bellsouth.net, inc.
7029 2182 1266 213 Windstream Communications Inc
18566 2069 382 184 Covad Communications
22773 2007 2929 125 Cox Communications, Inc.
1785 1975 677 125 PaeTec Communications, Inc.
20115 1671 1610 613 Charter Communications
4323 1605 1138 396 Time Warner Telecom
30036 1323 291 666 Mediacom Communications Corp
7018 1309 10805 850 AT&T WorldNet Services
11492 1215 223 333 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 1874 544 16 Corbina telecom
34984 1130 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 844 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 809 281 641 Akamai Technologies European
31148 786 41 19 FreeNet ISP
8551 717 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
58113 666 74 386 LIR DATACENTER TELECOM SRL

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
28573 2507 1368 96 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7303 1673 1152 210 Telecom Argentina Stet-France
8151 1353 2666 404 UniNet S.A. de C.V.
6503 1186 435 68 AVANTEL, S.A.
14754 942 128 85 Telgua S. A.
18881 847 716 18 Global Village Telecom
27947 803 87 95 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 692 306 85 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
36998 1137 80 4 MOBITEL
24863 672 274 33 LINKdotNET AS number
6713 536 615 23 Itissalat Al-MAGHRIB
8452 356 958 13 TEDATA
24835 275 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 188 698 88 MTN Network Solutions
33776 182 12 19 Starcomms Nigeria 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 3030 3694 86 bellsouth.net, inc.
4766 2951 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2507 1368 96 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7029 2182 1266 213 Windstream Communications Inc
18566 2069 382 184 Covad Communications
22773 2007 2929 125 Cox Communications, Inc.
1785 1975 677 125 PaeTec Communications, Inc.
8402 1874 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
17974 2515 2429 PT TELEKOMUNIKASI INDONESIA
28573 2507 2411 NET Servicos de Comunicao S.A
10620 2360 2124 TVCABLE BOGOTA
4766 2951 2029 Korea Telecom (KIX)
7029 2182 1969 Windstream Communications Inc
18566 2069 1885 Covad Communications
22773 2007 1882 Cox Communications, Inc.
8402 1874 1858 Corbina telecom
1785 1975 1850 PaeTec Communications, Inc.
7545 1863 1768 TPG Internet Pty Ltd

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
30031 UNALLOCATED 12.27.122.0/24 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 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
26064 UNALLOCATED 12.149.37.0/24 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
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.96.0/21 12886 LEWTelNet GmbH
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 mywire Datentechnik GmbH

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
41.222.80.0/21 37110 Moztel LDA
62.12.96.0/19 38478 SunnyVision Limited
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.

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 /8:17 /9:13 /10:29 /11:88 /12:248
/13:483 /14:875 /15:1561 /16:12669 /17:6611 /18:10894
/19:21759 /20:31849 /21:33629 /22:46293 /23:41598 /24:235464
/25:1393 /26:1782 /27:861 /28:180 /29:64 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2020 2069 Covad Communications
6389 1741 3030 bellsouth.net, inc.
7029 1598 2182 Windstream Communications Inc
8402 1570 1874 Corbina telecom
22773 1313 2007 Cox Communications, Inc.
30036 1203 1323 Mediacom Communications Corp
11492 1177 1215 Cable One
36998 1131 1137 MOBITEL
1785 1045 1975 PaeTec Communications, Inc.
7011 931 1175 Citizens Utilities

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

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

1:740 2:799 3:3 4:13 5:831 6:5
8:515 12:1920 13:3 14:772 15:11 16:3
17:8 20:19 23:252 24:1801 27:1438 31:1188
32:44 33:2 34:5 36:43 37:1700 38:863
39:2 40:164 41:2691 42:184 44:6 46:1772
47:2 49:614 50:673 52:12 54:28 55:8
57:27 58:1104 59:586 60:304 61:1445 62:975
63:2039 64:4285 65:2182 66:4286 67:2061 68:1116
69:3275 70:873 71:526 72:1897 74:2554 75:403
76:287 77:1087 78:1008 79:573 80:1252 81:977
82:609 83:579 84:559 85:1157 86:465 87:950
88:519 89:1792 90:281 91:5448 92:617 93:1685
94:1861 95:1544 96:498 97:340 98:1052 99:41
100:29 101:310 103:2345 105:488 106:134 107:207
108:514 109:1797 110:877 111:1043 112:499 113:768
114:687 115:999 116:871 117:796 118:1008 119:1265
120:380 121:816 122:1738 123:1161 124:1319 125:1316
128:634 129:224 130:331 131:647 132:326 133:145
134:258 135:62 136:221 137:244 138:344 139:184
140:199 141:309 142:542 143:367 144:479 145:90
146:525 147:380 148:699 149:360 150:168 151:556
152:415 153:194 154:35 155:383 156:260 157:389
158:271 159:711 160:334 161:423 162:375 163:202
164:576 165:452 166:359 167:576 168:1015 169:133
170:1017 171:174 172:4 173:1580 174:577 175:437
176:1136 177:1885 178:2019 179:2 180:1387 181:299
182:1116 183:380 184:663 185:329 186:2390 187:1255
188:1907 189:1407 190:6627 192:6466 193:5667 194:4508
195:3459 196:1325 197:772 198:4294 199:5271 200:5997
201:2369 202:8860 203:8792 204:4496 205:2549 206:2791
207:2832 208:4067 209:3545 210:2923 211:1567 212:1986
213:1940 214:936 215:94 216:5193 217:1578 218:606
219:347 220:1268 221:542 222:319 223:497

End of report
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