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, July 10, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 11 Jul, 2013

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

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

BGP routing table entries examined: 458247
Prefixes after maximum aggregation: 186567
Deaggregation factor: 2.46
Unique aggregates announced to Internet: 227877
Total ASes present in the Internet Routing Table: 44482
Prefixes per ASN: 10.30
Origin-only ASes present in the Internet Routing Table: 34822
Origin ASes announcing only one prefix: 16178
Transit ASes present in the Internet Routing Table: 5883
Transit-only ASes present in the Internet Routing Table: 148
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 2551
Unregistered ASNs in the Routing Table: 1094
Number of 32-bit ASNs allocated by the RIRs: 4861
Number of 32-bit ASNs visible in the Routing Table: 3777
Prefixes from 32-bit ASNs in the Routing Table: 11237
Special use prefixes present in the Routing Table: 27
Prefixes being announced from unallocated address space: 285
Number of addresses announced to Internet: 2627415564
Equivalent to 156 /8s, 155 /16s and 46 /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: 94.7
Total number of prefixes smaller than registry allocations: 160489

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

Prefixes being announced by APNIC Region ASes: 109799
Total APNIC prefixes after maximum aggregation: 33785
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 111688
Unique aggregates announced from the APNIC address blocks: 46038
APNIC Region origin ASes present in the Internet Routing Table: 4857
APNIC Prefixes per ASN: 23.00
APNIC Region origin ASes announcing only one prefix: 1214
APNIC Region transit ASes present in the Internet Routing Table: 831
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: 602
Number of APNIC addresses announced to Internet: 725315552
Equivalent to 43 /8s, 59 /16s and 111 /24s
Percentage of available APNIC address space announced: 84.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 159029
Total ARIN prefixes after maximum aggregation: 80506
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159568
Unique aggregates announced from the ARIN address blocks: 73885
ARIN Region origin ASes present in the Internet Routing Table: 15760
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 5996
ARIN Region transit ASes present in the Internet Routing Table: 1639
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: 1065752384
Equivalent to 63 /8s, 134 /16s and 23 /24s
Percentage of available ARIN address space announced: 56.4

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: 118445
Total RIPE prefixes after maximum aggregation: 60316
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 121941
Unique aggregates announced from the RIPE address blocks: 78676
RIPE Region origin ASes present in the Internet Routing Table: 17288
RIPE Prefixes per ASN: 7.05
RIPE Region origin ASes announcing only one prefix: 8196
RIPE Region transit ASes present in the Internet Routing Table: 2836
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2375
Number of RIPE addresses announced to Internet: 656348004
Equivalent to 39 /8s, 31 /16s and 19 /24s
Percentage of available RIPE address space announced: 95.4

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: 48751
Total LACNIC prefixes after maximum aggregation: 9400
LACNIC Deaggregation factor: 5.19
Prefixes being announced from the LACNIC address blocks: 53248
Unique aggregates announced from the LACNIC address blocks: 25050
LACNIC Region origin ASes present in the Internet Routing Table: 1977
LACNIC Prefixes per ASN: 26.93
LACNIC Region origin ASes announcing only one prefix: 582
LACNIC Region transit ASes present in the Internet Routing Table: 359
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: 775
Number of LACNIC addresses announced to Internet: 133203848
Equivalent to 7 /8s, 240 /16s and 135 /24s
Percentage of available LACNIC address space announced: 79.4

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: 10898
Total AfriNIC prefixes after maximum aggregation: 2520
AfriNIC Deaggregation factor: 4.32
Prefixes being announced from the AfriNIC address blocks: 11517
Unique aggregates announced from the AfriNIC address blocks: 3975
AfriNIC Region origin ASes present in the Internet Routing Table: 648
AfriNIC Prefixes per ASN: 17.77
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 136
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: 46346752
Equivalent to 2 /8s, 195 /16s and 50 /24s
Percentage of available AfriNIC address space announced: 46.0

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 2936 11561 920 Korea Telecom (KIX)
17974 2576 855 92 PT TELEKOMUNIKASI INDONESIA
7545 2027 320 109 TPG Internet Pty Ltd
4755 1755 391 192 TATA Communications formerly
9829 1531 1220 44 BSNL National Internet Backbo
9583 1461 117 563 Sify Limited
4808 1173 2151 340 CNCGROUP IP network: China169
7552 1159 1080 13 Vietel Corporation
9498 1156 309 71 BHARTI Airtel Ltd.
24560 1082 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 2988 3691 69 bellsouth.net, inc.
18566 2066 382 184 Covad Communications
1785 1999 678 126 PaeTec Communications, Inc.
22773 1991 2927 123 Cox Communications, Inc.
20115 1663 1617 616 Charter Communications
4323 1620 1134 403 Time Warner Telecom
701 1532 11127 799 UUNET Technologies, Inc.
30036 1341 300 657 Mediacom Communications Corp
7018 1299 11035 821 AT&T WorldNet Services
11492 1224 218 360 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 1653 544 16 Corbina telecom
34984 1286 244 222 BILISIM TELEKOM
2118 1271 97 13 EUnet/RELCOM Autonomous Syste
20940 897 310 710 Akamai Technologies European
13188 836 98 80 Educational Network
31148 808 40 25 FreeNet ISP
6830 783 2375 440 UPC Distribution Services
8551 780 370 45 Bezeq International
12479 679 789 57 Uni2 Autonomous System
34744 656 171 76 SC GVM SISTEM 2003 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 2917 1582 107 NET Servicos de Comunicao S.A
10620 2687 422 188 TVCABLE BOGOTA
7303 1732 1155 221 Telecom Argentina Stet-France
8151 1272 2747 386 UniNet S.A. de C.V.
18881 1117 844 20 Global Village Telecom
6503 865 434 63 AVANTEL, S.A.
27947 827 94 91 Telconet S.A
3816 719 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
11172 618 88 66 Servicios Alestra S.A de C.V

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 1172 80 4 MOBITEL
24863 883 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 452 956 9 TEDATA
24835 345 80 8 RAYA Telecom - Egypt
3741 259 922 218 The Internet Solution
15706 220 32 6 Sudatel Internet Exchange Aut
29571 219 17 12 Ci Telecom Autonomous system
36992 205 527 22 Etisalat MISR
12258 194 28 67 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
6389 2988 3691 69 bellsouth.net, inc.
4766 2936 11561 920 Korea Telecom (KIX)
28573 2917 1582 107 NET Servicos de Comunicao S.A
10620 2687 422 188 TVCABLE BOGOTA
17974 2576 855 92 PT TELEKOMUNIKASI INDONESIA
18566 2066 382 184 Covad Communications
7545 2027 320 109 TPG Internet Pty Ltd
1785 1999 678 126 PaeTec Communications, Inc.
22773 1991 2927 123 Cox Communications, Inc.
4755 1755 391 192 TATA Communications formerly

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

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

ASN No of nets Net Savings Description
28573 2917 2810 NET Servicos de Comunicao S.A
10620 2687 2499 TVCABLE BOGOTA
17974 2576 2484 PT TELEKOMUNIKASI INDONESIA
4766 2936 2016 Korea Telecom (KIX)
7545 2027 1918 TPG Internet Pty Ltd
18566 2066 1882 Covad Communications
1785 1999 1873 PaeTec Communications, Inc.
22773 1991 1868 Cox Communications, Inc.
8402 1653 1637 Corbina telecom
4755 1755 1563 TATA Communications formerly

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
59628 UNALLOCATED 5.200.128.0/17 48159 Telecommunication In
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

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
128.0.42.0/24 60619 >>UNKNOWN<<
128.0.43.0/24 60619 >>UNKNOWN<<
128.0.46.0/23 39743 Mobimax Telecom SRL
128.0.53.0/24 60993 Totalsoft SA
128.0.54.0/24 60972 Carpatair SA
128.0.55.0/24 48571 SC efectRO SRL
128.0.56.0/24 60996 >>UNKNOWN<<

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

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

Network Origin AS Description
5.200.128.0/17 59628 >>UNKNOWN<<
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.
64.185.230.0/24 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 /11:92 /12:250
/13:481 /14:901 /15:1604 /16:12718 /17:6645 /18:11058
/19:22511 /20:32102 /21:34486 /22:48235 /23:42541 /24:240754
/25:1274 /26:1532 /27:861 /28:43 /29:68 /30:18
/31:0 /32:16

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

ASN No of nets Total ann. Description
18566 2017 2066 Covad Communications
6389 1716 2988 bellsouth.net, inc.
8402 1349 1653 Corbina telecom
22773 1295 1991 Cox Communications, Inc.
30036 1209 1341 Mediacom Communications Corp
11492 1185 1224 Cable One
36998 1140 1172 MOBITEL
1785 1067 1999 PaeTec Communications, Inc.
6983 1016 1145 ITC^Deltacom
10620 1000 2687 TVCABLE BOGOTA

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

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

1:847 2:741 3:3 4:19 5:812 6:16
8:561 12:1913 13:3 14:864 15:11 16:3
17:10 20:17 23:296 24:1771 27:1482 31:1318
32:45 33:2 34:5 36:56 37:1864 38:879
39:2 40:171 41:2756 42:224 44:8 46:1956
47:2 49:666 50:752 52:12 54:35 55:6
57:26 58:1158 59:584 60:328 61:1415 62:1126
63:2010 64:4342 65:2158 66:4190 67:2015 68:1076
69:3288 70:795 71:491 72:1944 74:2453 75:324
76:308 77:1143 78:1011 79:614 80:1270 81:1017
82:633 83:582 84:588 85:1188 86:458 87:1019
88:545 89:1770 90:149 91:5526 92:617 93:1779
94:1936 95:1690 96:523 97:343 98:1024 99:42
100:30 101:341 103:2940 105:470 106:138 107:207
108:512 109:1863 110:922 111:1072 112:548 113:815
114:691 115:969 116:968 117:799 118:1105 119:1320
120:384 121:739 122:1806 123:1221 124:1376 125:1383
128:639 129:223 130:309 131:670 132:360 133:155
134:269 135:68 136:255 137:242 138:341 139:190
140:199 141:326 142:539 143:382 144:503 145:98
146:527 147:395 148:665 149:352 150:148 151:520
152:416 153:189 154:28 155:415 156:265 157:399
158:278 159:721 160:344 161:452 162:479 163:221
164:580 165:501 166:254 167:595 168:1023 169:129
170:1045 171:181 172:23 173:1599 174:541 175:479
176:1160 177:2132 178:1870 179:62 180:1463 181:492
182:1261 183:422 184:667 185:632 186:2315 187:1320
188:2090 189:1285 190:6663 192:6844 193:5857 194:4625
195:3467 196:1344 197:895 198:4507 199:5344 200:6008
201:2172 202:8814 203:8885 204:4511 205:2563 206:2832
207:2847 208:3996 209:3588 210:2919 211:1521 212:2181
213:1991 214:907 215:99 216:5265 217:1614 218:621
219:321 220:1280 221:557 222:321 223:447

End of report
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