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, August 14, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 15 Aug, 2013

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

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

BGP routing table entries examined: 463561
Prefixes after maximum aggregation: 187134
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 229273
Total ASes present in the Internet Routing Table: 44731
Prefixes per ASN: 10.36
Origin-only ASes present in the Internet Routing Table: 34989
Origin ASes announcing only one prefix: 16217
Transit ASes present in the Internet Routing Table: 5893
Transit-only ASes present in the Internet Routing Table: 156
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 4387
Unregistered ASNs in the Routing Table: 1552
Number of 32-bit ASNs allocated by the RIRs: 4948
Number of 32-bit ASNs visible in the Routing Table: 3849
Prefixes from 32-bit ASNs in the Routing Table: 11653
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 284
Number of addresses announced to Internet: 2634784140
Equivalent to 157 /8s, 11 /16s and 157 /24s
Percentage of available address space announced: 71.2
Percentage of allocated address space announced: 71.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.9
Total number of prefixes smaller than registry allocations: 162393

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

Prefixes being announced by APNIC Region ASes: 110901
Total APNIC prefixes after maximum aggregation: 33596
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 112714
Unique aggregates announced from the APNIC address blocks: 46190
APNIC Region origin ASes present in the Internet Routing Table: 4867
APNIC Prefixes per ASN: 23.16
APNIC Region origin ASes announcing only one prefix: 1220
APNIC Region transit ASes present in the Internet Routing Table: 823
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 28
Number of APNIC region 32-bit ASNs visible in the Routing Table: 638
Number of APNIC addresses announced to Internet: 726056000
Equivalent to 43 /8s, 70 /16s and 188 /24s
Percentage of available APNIC address space announced: 84.9

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: 160277
Total ARIN prefixes after maximum aggregation: 80908
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 160859
Unique aggregates announced from the ARIN address blocks: 74697
ARIN Region origin ASes present in the Internet Routing Table: 15830
ARIN Prefixes per ASN: 10.16
ARIN Region origin ASes announcing only one prefix: 6000
ARIN Region transit ASes present in the Internet Routing Table: 1659
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: 19
Number of ARIN addresses announced to Internet: 1070027008
Equivalent to 63 /8s, 199 /16s and 81 /24s
Percentage of available ARIN address space announced: 56.6

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, 62464-63487, 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: 118796
Total RIPE prefixes after maximum aggregation: 60503
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 122602
Unique aggregates announced from the RIPE address blocks: 78522
RIPE Region origin ASes present in the Internet Routing Table: 17360
RIPE Prefixes per ASN: 7.06
RIPE Region origin ASes announcing only one prefix: 8231
RIPE Region transit ASes present in the Internet Routing Table: 2820
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: 2386
Number of RIPE addresses announced to Internet: 656909860
Equivalent to 39 /8s, 39 /16s and 166 /24s
Percentage of available RIPE address space announced: 95.5

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
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: 50259
Total LACNIC prefixes after maximum aggregation: 9550
LACNIC Deaggregation factor: 5.26
Prefixes being announced from the LACNIC address blocks: 54910
Unique aggregates announced from the LACNIC address blocks: 25625
LACNIC Region origin ASes present in the Internet Routing Table: 1997
LACNIC Prefixes per ASN: 27.50
LACNIC Region origin ASes announcing only one prefix: 575
LACNIC Region transit ASes present in the Internet Routing Table: 369
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 800
Number of LACNIC addresses announced to Internet: 134991656
Equivalent to 8 /8s, 11 /16s and 207 /24s
Percentage of available LACNIC address space announced: 80.5

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 11588
Total AfriNIC prefixes after maximum aggregation: 2537
AfriNIC Deaggregation factor: 4.57
Prefixes being announced from the AfriNIC address blocks: 12192
Unique aggregates announced from the AfriNIC address blocks: 3976
AfriNIC Region origin ASes present in the Internet Routing Table: 645
AfriNIC Prefixes per ASN: 18.90
AfriNIC Region origin ASes announcing only one prefix: 191
AfriNIC Region transit ASes present in the Internet Routing Table: 133
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46470912
Equivalent to 2 /8s, 197 /16s and 23 /24s
Percentage of available AfriNIC address space announced: 46.2

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 2921 11561 918 Korea Telecom (KIX)
17974 2653 871 92 PT TELEKOMUNIKASI INDONESIA
7545 2043 321 112 TPG Internet Pty Ltd
4755 1780 393 197 TATA Communications formerly
9829 1537 1221 45 BSNL National Internet Backbo
9583 1224 92 504 Sify Limited
9498 1175 309 70 BHARTI Airtel Ltd.
4808 1155 2127 333 CNCGROUP IP network: China169
7552 1139 1080 13 Vietel Corporation
24560 1088 394 164 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 2978 3689 62 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
1785 2006 679 125 PaeTec Communications, Inc.
22773 2006 2927 123 Cox Communications, Inc.
20115 1675 1644 622 Charter Communications
4323 1618 1105 408 Time Warner Telecom
701 1520 11103 797 UUNET Technologies, Inc.
30036 1367 307 638 Mediacom Communications Corp
7018 1316 11293 831 AT&T WorldNet Services
22561 1209 395 217 Digital Teleport, Inc

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 1645 544 16 Corbina telecom
2118 1386 97 13 EUnet/RELCOM Autonomous Syste
34984 1299 244 221 BILISIM TELEKOM
31148 978 43 17 FreeNet ISP
20940 975 348 747 Akamai Technologies European
6830 898 2371 429 UPC Distribution Services
13188 843 99 70 Educational Network
8551 769 370 45 Bezeq International
12479 687 797 53 Uni2 Autonomous System
58113 541 55 339 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 3052 1603 105 NET Servicos de Comunicao S.A
10620 2667 424 225 TVCABLE BOGOTA
7303 1730 1157 220 Telecom Argentina Stet-France
18881 1358 844 20 Global Village Telecom
8151 1282 2764 391 UniNet S.A. de C.V.
11830 946 364 15 Instituto Costarricense de El
27947 837 94 91 Telconet S.A
6503 787 434 63 AVANTEL, S.A.
6147 740 374 25 Telefonica Del Peru
3816 722 302 83 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 1860 112 5 MOBITEL
24863 874 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 437 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 217 The Internet Solution
15706 221 32 6 Sudatel Internet Exchange Aut
29571 220 17 12 Ci Telecom Autonomous system
36992 216 489 27 Etisalat MISR
12258 193 28 71 Vodacom Internet Company

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
28573 3052 1603 105 NET Servicos de Comunicao S.A
6389 2978 3689 62 bellsouth.net, inc.
4766 2921 11561 918 Korea Telecom (KIX)
10620 2667 424 225 TVCABLE BOGOTA
17974 2653 871 92 PT TELEKOMUNIKASI INDONESIA
18566 2065 382 184 Covad Communications
7545 2043 321 112 TPG Internet Pty Ltd
1785 2006 679 125 PaeTec Communications, Inc.
22773 2006 2927 123 Cox Communications, Inc.
36998 1860 112 5 MOBITEL

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
6389 2978 2916 bellsouth.net, inc.
17974 2653 2561 PT TELEKOMUNIKASI INDONESIA
10620 2667 2442 TVCABLE BOGOTA
4766 2921 2003 Korea Telecom (KIX)
7545 2043 1931 TPG Internet Pty Ltd
22773 2006 1883 Cox Communications, Inc.
18566 2065 1881 Covad Communications
1785 2006 1881 PaeTec Communications, Inc.
36998 1860 1855 MOBITEL
8402 1645 1629 Corbina telecom

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
30621 UNALLOCATED 12.151.74.0/23 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
100.100.0.0/24 4847 China Networks Inter-Exchange

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

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

Network Origin AS Description
23.92.0.0/20 62646 WireStar, Inc.
27.54.116.0/24 55452 Tg Agas Technology Sdn Bhd
27.54.116.0/22 55452 Tg Agas Technology Sdn Bhd
27.54.119.0/24 55452 Tg Agas Technology Sdn Bhd
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
62.182.96.0/23 15830 TELECITY London
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.

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 /8:16 /9:11 /10:30 /11:93 /12:250
/13:480 /14:906 /15:1607 /16:12733 /17:6642 /18:11048
/19:22532 /20:32282 /21:34857 /22:48928 /23:42794 /24:245124
/25:1047 /26:1427 /27:599 /28:43 /29:75 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1825 1860 MOBITEL
6389 1713 2978 bellsouth.net, inc.
8402 1345 1645 Corbina telecom
22773 1304 2006 Cox Communications, Inc.
30036 1231 1367 Mediacom Communications Corp
11492 1156 1195 Cable One
1785 1079 2006 PaeTec Communications, Inc.
6983 1024 1152 ITC^Deltacom
10620 990 2667 TVCABLE BOGOTA

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

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

1:815 2:755 3:3 4:19 5:905 6:17
8:598 12:1896 13:2 14:868 15:11 16:3
17:10 18:19 20:17 23:308 24:1767 27:1540
31:1346 32:45 33:2 34:5 36:70 37:1816
38:896 39:2 40:180 41:3231 42:258 44:8
46:1961 47:3 49:660 50:838 52:12 54:37
55:7 57:26 58:1172 59:641 60:332 61:1495
62:1179 63:2005 64:4343 65:2154 66:4203 67:2048
68:1091 69:3314 70:805 71:488 72:1914 74:2508
75:324 76:306 77:1141 78:1047 79:616 80:1295
81:1017 82:652 83:586 84:568 85:1218 86:474
87:1040 88:537 89:1814 90:158 91:5565 92:624
93:1657 94:2006 95:1595 96:586 97:346 98:1032
99:43 100:29 101:596 103:3134 105:519 106:139
107:208 108:488 109:1864 110:941 111:1098 112:567
113:802 114:729 115:1103 116:959 117:800 118:1142
119:1297 120:361 121:850 122:1780 123:1244 124:1369
125:1408 128:643 129:223 130:310 131:667 132:349
133:160 134:275 135:72 136:259 137:242 138:344
139:189 140:201 141:319 142:532 143:396 144:524
145:93 146:532 147:425 148:678 149:353 150:153
151:590 152:413 153:191 154:30 155:415 156:274
157:405 158:276 159:747 160:346 161:455 162:577
163:222 164:581 165:542 166:255 167:602 168:1035
169:126 170:1070 171:188 172:23 173:1580 174:571
175:491 176:1158 177:2146 178:1905 179:94 180:1515
181:639 182:1229 183:432 184:655 185:746 186:2425
187:1377 188:1869 189:1280 190:6982 192:6878 193:5847
194:4708 195:3596 196:1332 197:1010 198:4587 199:5387
200:5982 201:2620 202:8837 203:8900 204:4518 205:2605
206:2833 207:2898 208:3991 209:3595 210:2940 211:1552
212:2262 213:2053 214:928 215:100 216:5243 217:1649
218:619 219:323 220:1277 221:551 222:322 223:463


End of report
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