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, March 26, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 27 Mar, 2013

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

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

BGP routing table entries examined: 447728
Prefixes after maximum aggregation: 183597
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 220431
Total ASes present in the Internet Routing Table: 43640
Prefixes per ASN: 10.26
Origin-only ASes present in the Internet Routing Table: 34358
Origin ASes announcing only one prefix: 16023
Transit ASes present in the Internet Routing Table: 5788
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 387
Unregistered ASNs in the Routing Table: 137
Number of 32-bit ASNs allocated by the RIRs: 4652
Number of 32-bit ASNs visible in the Routing Table: 3494
Prefixes from 32-bit ASNs in the Routing Table: 10103
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 229
Number of addresses announced to Internet: 2624365260
Equivalent to 156 /8s, 108 /16s and 162 /24s
Percentage of available address space announced: 70.9
Percentage of allocated address space announced: 70.9
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: 158286

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

Prefixes being announced by APNIC Region ASes: 107728
Total APNIC prefixes after maximum aggregation: 33249
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108890
Unique aggregates announced from the APNIC address blocks: 44196
APNIC Region origin ASes present in the Internet Routing Table: 4824
APNIC Prefixes per ASN: 22.57
APNIC Region origin ASes announcing only one prefix: 1232
APNIC Region transit ASes present in the Internet Routing Table: 822
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 471
Number of APNIC addresses announced to Internet: 719811648
Equivalent to 42 /8s, 231 /16s and 116 /24s
Percentage of available APNIC address space announced: 84.1

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: 157144
Total ARIN prefixes after maximum aggregation: 79294
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157787
Unique aggregates announced from the ARIN address blocks: 72126
ARIN Region origin ASes present in the Internet Routing Table: 15564
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5905
ARIN Region transit ASes present in the Internet Routing Table: 1607
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: 1078339200
Equivalent to 64 /8s, 70 /16s and 38 /24s
Percentage of available ARIN address space announced: 57.0

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: 114682
Total RIPE prefixes after maximum aggregation: 59205
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 118287
Unique aggregates announced from the RIPE address blocks: 76297
RIPE Region origin ASes present in the Internet Routing Table: 17109
RIPE Prefixes per ASN: 6.91
RIPE Region origin ASes announcing only one prefix: 8149
RIPE Region transit ASes present in the Internet Routing Table: 2795
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2255
Number of RIPE addresses announced to Internet: 654398180
Equivalent to 39 /8s, 1 /16s and 82 /24s
Percentage of available RIPE address space announced: 95.1

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: 47473
Total LACNIC prefixes after maximum aggregation: 9366
LACNIC Deaggregation factor: 5.07
Prefixes being announced from the LACNIC address blocks: 51423
Unique aggregates announced from the LACNIC address blocks: 23831
LACNIC Region origin ASes present in the Internet Routing Table: 1872
LACNIC Prefixes per ASN: 27.47
LACNIC Region origin ASes announcing only one prefix: 550
LACNIC Region transit ASes present in the Internet Routing Table: 348
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: 743
Number of LACNIC addresses announced to Internet: 125236264
Equivalent to 7 /8s, 118 /16s and 244 /24s
Percentage of available LACNIC address space announced: 74.6

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: 10462
Total AfriNIC prefixes after maximum aggregation: 2433
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 11112
Unique aggregates announced from the AfriNIC address blocks: 3784
AfriNIC Region origin ASes present in the Internet Routing Table: 610
AfriNIC Prefixes per ASN: 18.22
AfriNIC Region origin ASes announcing only one prefix: 187
AfriNIC Region transit ASes present in the Internet Routing Table: 128
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: 7
Number of AfriNIC addresses announced to Internet: 46189824
Equivalent to 2 /8s, 192 /16s and 205 /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 2949 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1848 301 90 TPG Internet Pty Ltd
4755 1726 392 197 TATA Communications formerly
9829 1486 1189 43 BSNL National Internet Backbo
9583 1280 97 530 Sify Limited
7552 1179 1066 12 Vietel Corporation
4808 1119 2104 324 CNCGROUP IP network: China169
24560 1060 385 165 Bharti Airtel Ltd., Telemedia
9498 1059 310 73 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 3032 3694 87 bellsouth.net, inc.
7029 2171 1266 216 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 1996 2929 125 Cox Communications, Inc.
1785 1967 677 125 PaeTec Communications, Inc.
20115 1683 1613 620 Charter Communications
4323 1611 1139 401 Time Warner Telecom
30036 1327 292 670 Mediacom Communications Corp
7018 1313 10810 850 AT&T WorldNet Services
11492 1212 222 330 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 1863 544 16 Corbina telecom
34984 1117 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 841 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 801 278 636 Akamai Technologies European
31148 786 41 19 FreeNet ISP
6830 716 2315 437 UPC Distribution Services
8551 716 370 43 Bezeq International
58113 664 73 386 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 2468 1337 84 NET Servicos de Comunicao S.A
10620 2362 407 238 TVCABLE BOGOTA
7303 1674 1152 210 Telecom Argentina Stet-France
8151 1358 2686 410 UniNet S.A. de C.V.
6503 1186 435 68 AVANTEL, S.A.
14754 943 129 89 Telgua S. A.
18881 839 716 18 Global Village Telecom
27947 798 87 97 Telconet S.A
11830 726 364 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 1286 80 4 MOBITEL
24863 891 274 34 LINKdotNET AS number
6713 535 615 23 Itissalat Al-MAGHRIB
8452 443 958 13 TEDATA
24835 342 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 189 698 88 MTN Network Solutions

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 3032 3694 87 bellsouth.net, inc.
4766 2949 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2468 1337 84 NET Servicos de Comunicao S.A
10620 2362 407 238 TVCABLE BOGOTA
7029 2171 1266 216 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 1996 2929 125 Cox Communications, Inc.
1785 1967 677 125 PaeTec Communications, Inc.
8402 1863 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 2508 2422 PT TELEKOMUNIKASI INDONESIA
28573 2468 2384 NET Servicos de Comunicao S.A
10620 2362 2124 TVCABLE BOGOTA
4766 2949 2027 Korea Telecom (KIX)
7029 2171 1955 Windstream Communications Inc
18566 2070 1885 Covad Communications
22773 1996 1871 Cox Communications, Inc.
8402 1863 1847 Corbina telecom
1785 1967 1842 PaeTec Communications, Inc.
7545 1848 1758 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 /12:247
/13:483 /14:876 /15:1559 /16:12650 /17:6607 /18:10889
/19:21741 /20:31743 /21:33550 /22:46242 /23:41623 /24:235056
/25:1387 /26:1771 /27:864 /28:179 /29:77 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2020 2070 Covad Communications
6389 1742 3032 bellsouth.net, inc.
8402 1585 1863 Corbina telecom
7029 1578 2171 Windstream Communications Inc
22773 1306 1996 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1209 1327 Mediacom Communications Corp
11492 1174 1212 Cable One
1785 1043 1967 PaeTec Communications, Inc.
7011 942 1187 Citizens Utilities

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

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

1:733 2:791 3:3 4:13 5:834 6:3
8:513 12:1921 13:3 14:764 15:11 16:3
17:8 20:19 23:247 24:1802 27:1474 31:1166
32:44 33:2 34:5 36:43 37:1447 38:864
39:2 40:159 41:2682 42:183 44:6 46:1764
47:2 49:609 50:673 52:12 54:28 55:9
57:27 58:1101 59:598 60:303 61:1450 62:1006
63:2039 64:4289 65:2178 66:4283 67:2062 68:1115
69:3264 70:871 71:526 72:1898 74:2547 75:399
76:293 77:1085 78:1049 79:570 80:1246 81:978
82:611 83:574 84:564 85:1151 86:465 87:950
88:514 89:1784 90:262 91:5444 92:608 93:1692
94:1873 95:1557 96:499 97:336 98:1048 99:41
100:29 101:311 103:2309 105:520 106:133 107:207
108:515 109:1814 110:859 111:1037 112:499 113:768
114:683 115:1011 116:864 117:790 118:998 119:1267
120:381 121:824 122:1743 123:1183 124:1326 125:1317
128:546 129:221 130:329 131:656 132:332 133:145
134:257 135:62 136:220 137:245 138:343 139:181
140:200 141:320 142:534 143:371 144:485 145:90
146:523 147:368 148:696 149:352 150:162 151:529
152:415 153:194 154:34 155:384 156:251 157:392
158:270 159:712 160:334 161:424 162:374 163:208
164:577 165:452 166:371 167:575 168:1017 169:132
170:1030 171:172 172:4 173:1577 174:579 175:431
176:1136 177:1863 178:1959 179:1 180:1389 181:300
182:1229 183:321 184:659 185:310 186:2402 187:1246
188:1902 189:1396 190:6643 192:6419 193:5681 194:4514
195:3469 196:1300 197:900 198:4274 199:5267 200:6000
201:2352 202:8863 203:8756 204:4491 205:2550 206:2785
207:2823 208:4061 209:3539 210:2918 211:1567 212:2002
213:1948 214:914 215:95 216:5197 217:1578 218:605
219:351 220:1270 221:547 222:320 223:488

End of report
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