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, September 23, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 24 Sep, 2013

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

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

BGP routing table entries examined: 468203
Prefixes after maximum aggregation: 188722
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 232570
Total ASes present in the Internet Routing Table: 45040
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 35181
Origin ASes announcing only one prefix: 16265
Transit ASes present in the Internet Routing Table: 5905
Transit-only ASes present in the Internet Routing Table: 161
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 285
Unregistered ASNs in the Routing Table: 157
Number of 32-bit ASNs allocated by the RIRs: 5083
Number of 32-bit ASNs visible in the Routing Table: 3954
Prefixes from 32-bit ASNs in the Routing Table: 12318
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 505
Number of addresses announced to Internet: 2643931412
Equivalent to 157 /8s, 151 /16s and 49 /24s
Percentage of available address space announced: 71.4
Percentage of allocated address space announced: 71.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 164296

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

Prefixes being announced by APNIC Region ASes: 110884
Total APNIC prefixes after maximum aggregation: 33706
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 112899
Unique aggregates announced from the APNIC address blocks: 46660
APNIC Region origin ASes present in the Internet Routing Table: 4871
APNIC Prefixes per ASN: 23.18
APNIC Region origin ASes announcing only one prefix: 1218
APNIC Region transit ASes present in the Internet Routing Table: 832
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 29
Number of APNIC region 32-bit ASNs visible in the Routing Table: 684
Number of APNIC addresses announced to Internet: 728210176
Equivalent to 43 /8s, 103 /16s and 155 /24s
Percentage of available APNIC address space announced: 85.1

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-63999, 131072-133631
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: 162685
Total ARIN prefixes after maximum aggregation: 81376
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163220
Unique aggregates announced from the ARIN address blocks: 75895
ARIN Region origin ASes present in the Internet Routing Table: 15890
ARIN Prefixes per ASN: 10.27
ARIN Region origin ASes announcing only one prefix: 6022
ARIN Region transit ASes present in the Internet Routing Table: 1656
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: 21
Number of ARIN addresses announced to Internet: 1071541760
Equivalent to 63 /8s, 222 /16s and 110 /24s
Percentage of available ARIN address space announced: 56.7

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: 118916
Total RIPE prefixes after maximum aggregation: 61218
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 122732
Unique aggregates announced from the RIPE address blocks: 79389
RIPE Region origin ASes present in the Internet Routing Table: 17430
RIPE Prefixes per ASN: 7.04
RIPE Region origin ASes announcing only one prefix: 8256
RIPE Region transit ASes present in the Internet Routing Table: 2805
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2399
Number of RIPE addresses announced to Internet: 657076708
Equivalent to 39 /8s, 42 /16s and 49 /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, 61952-62463, 196608-200191
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: 51614
Total LACNIC prefixes after maximum aggregation: 9811
LACNIC Deaggregation factor: 5.26
Prefixes being announced from the LACNIC address blocks: 56582
Unique aggregates announced from the LACNIC address blocks: 26203
LACNIC Region origin ASes present in the Internet Routing Table: 2026
LACNIC Prefixes per ASN: 27.93
LACNIC Region origin ASes announcing only one prefix: 576
LACNIC Region transit ASes present in the Internet Routing Table: 381
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: 844
Number of LACNIC addresses announced to Internet: 139254320
Equivalent to 8 /8s, 76 /16s and 218 /24s
Percentage of available LACNIC address space announced: 83.0

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: 11652
Total AfriNIC prefixes after maximum aggregation: 2536
AfriNIC Deaggregation factor: 4.59
Prefixes being announced from the AfriNIC address blocks: 12265
Unique aggregates announced from the AfriNIC address blocks: 3975
AfriNIC Region origin ASes present in the Internet Routing Table: 653
AfriNIC Prefixes per ASN: 18.78
AfriNIC Region origin ASes announcing only one prefix: 193
AfriNIC Region transit ASes present in the Internet Routing Table: 134
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46656000
Equivalent to 2 /8s, 199 /16s and 234 /24s
Percentage of available AfriNIC address space announced: 46.3

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 2923 11561 924 Korea Telecom (KIX)
17974 2679 903 91 PT TELEKOMUNIKASI INDONESIA
7545 2080 321 112 TPG Internet Pty Ltd
4755 1771 391 188 TATA Communications formerly
9829 1544 1236 41 BSNL National Internet Backbo
9583 1232 92 505 Sify Limited
9498 1191 309 71 BHARTI Airtel Ltd.
4808 1188 2133 348 CNCGROUP IP network: China169
7552 1163 1080 13 Vietel Corporation
24560 1090 380 164 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 3067 3689 62 BellSouth.net Inc.
18566 2065 382 184 Covad Communications
22773 2043 2933 124 Cox Communications, Inc.
1785 2017 679 125 PaeTec Communications, Inc.
20115 1680 1651 628 Charter Communications
4323 1612 1103 409 Time Warner Telecom
701 1530 11152 798 UUNET Technologies, Inc.
30036 1347 303 631 Mediacom Communications Corp
7018 1305 11244 821 AT&T WorldNet Services
22561 1236 386 201 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 1778 544 16 OJSC "Vimpelcom"
34984 1362 244 220 TELLCOM ILETISIM HIZMETLERI A
20940 1026 378 789 Akamai Technologies European
31148 987 43 17 FreeNet ISP
6830 893 2367 425 UPC Distribution Services
13188 847 99 70 TOV "Bank-Inform"
8551 746 370 41 Bezeq International
12479 676 799 49 Uni2 Autonomous System
35228 528 246 16 Avatar Broadband Limited
3320 511 8416 406 Deutsche Telekom AG

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 3295 1726 95 NET Servicos de Comunicao S.A
10620 2573 420 250 TVCABLE BOGOTA
7303 1715 1135 227 Telecom Argentina Stet-France
18881 1432 844 20 Global Village Telecom
8151 1326 2798 409 UniNet S.A. de C.V.
11830 865 364 15 Instituto Costarricense de El
27947 837 93 94 Telconet S.A
6503 834 434 64 AVANTEL, S.A.
7738 780 1498 36 Telecomunicacoes da Bahia S.A
6147 740 376 21 Telefonica Del Peru

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 1864 112 5 Sudanese Mobile Telephone (ZA
24863 876 274 30 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 427 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 216 The Internet Solution
29571 222 17 12 Ci Telecom Autonomous system
36992 222 501 28 Etisalat MISR
15706 221 32 6 Sudatel Internet Exchange Aut
29975 192 668 21 Vodacom

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 3295 1726 95 NET Servicos de Comunicao S.A
6389 3067 3689 62 BellSouth.net Inc.
4766 2923 11561 924 Korea Telecom (KIX)
17974 2679 903 91 PT TELEKOMUNIKASI INDONESIA
10620 2573 420 250 TVCABLE BOGOTA
7545 2080 321 112 TPG Internet Pty Ltd
18566 2065 382 184 Covad Communications
22773 2043 2933 124 Cox Communications, Inc.
1785 2017 679 125 PaeTec Communications, Inc.
36998 1864 112 5 Sudanese Mobile Telephone (ZA

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 3067 3005 BellSouth.net Inc.
17974 2679 2588 PT TELEKOMUNIKASI INDONESIA
10620 2573 2323 TVCABLE BOGOTA
4766 2923 1999 Korea Telecom (KIX)
7545 2080 1968 TPG Internet Pty Ltd
22773 2043 1919 Cox Communications, Inc.
1785 2017 1892 PaeTec Communications, Inc.
18566 2065 1881 Covad Communications
36998 1864 1859 Sudanese Mobile Telephone (ZA
8402 1778 1762 OJSC "Vimpelcom"

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
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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
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
23.90.128.0/18 27418 OUTOFWALL INC.
23.90.192.0/18 36086 Broad Communications Technolo
23.91.0.0/19 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.96.0/20 40676 Psychz Networks
23.91.112.0/21 32475 MidPhase Inc.
23.91.160.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c
23.91.164.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.168.0/22 36493 3757277 Canada Inc. (oa 295.c

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 /10:31 /11:93 /12:250
/13:479 /14:914 /15:1626 /16:12794 /17:6691 /18:11177
/19:22923 /20:32529 /21:35141 /22:49607 /23:43012 /24:248434
/25:842 /26:992 /27:481 /28:48 /29:79 /30:19
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1829 1864 Sudanese Mobile Telephone (ZA
6389 1712 3067 BellSouth.net Inc.
8402 1489 1778 OJSC "Vimpelcom"
22773 1329 2043 Cox Communications, Inc.
30036 1207 1347 Mediacom Communications Corp
11492 1187 1228 Cable One
1785 1084 2017 PaeTec Communications, Inc.
6983 1025 1152 ITC^Deltacom
22561 960 1236 Digital Teleport, Inc

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

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

1:820 2:857 3:3 4:17 5:968 6:19
8:607 12:1895 13:3 14:870 15:11 16:3
17:13 18:19 20:21 23:405 24:1744 27:1582
31:1464 32:43 33:2 34:5 36:80 37:1836
38:906 39:3 40:179 41:3290 42:251 44:13
46:2003 47:6 49:676 50:844 52:12 54:39
55:7 57:26 58:1169 59:604 60:341 61:1420
62:1194 63:1987 64:4550 65:2363 66:4175 67:2079
68:1086 69:3334 70:868 71:495 72:2004 74:2555
75:330 76:300 77:1179 78:1062 79:632 80:1337
81:1030 82:632 83:582 84:587 85:1268 86:490
87:1044 88:552 89:1799 90:158 91:5708 92:611
93:1642 94:2026 95:1597 96:517 97:342 98:1043
99:43 100:31 101:608 103:3327 105:520 106:142
107:208 108:507 109:1899 110:969 111:1124 112:575
113:798 114:731 115:1008 116:971 117:825 118:1168
119:1288 120:363 121:741 122:1881 123:1242 124:1385
125:1427 128:628 129:322 130:321 131:674 132:350
133:161 134:542 135:67 136:273 137:267 138:348
139:180 140:205 141:325 142:553 143:411 144:502
145:100 146:515 147:490 148:697 149:356 150:158
151:585 152:412 153:195 154:46 155:485 156:279
157:419 158:285 159:769 160:349 161:451 162:711
163:227 164:637 165:573 166:258 167:616 168:1050
169:128 170:1085 171:201 172:25 173:1612 174:667
175:499 176:1212 177:2328 178:1892 179:143 180:1520
181:734 182:1276 183:463 184:655 185:871 186:2556
187:1447 188:1925 189:1322 190:7135 192:6939 193:5663
194:4067 195:3332 196:1316 197:998 198:4682 199:5460
200:6044 201:2551 202:8977 203:8912 204:4517 205:2638
206:2855 207:2897 208:4009 209:3610 210:2950 211:1554
212:2290 213:2051 214:926 215:99 216:5338 217:1662
218:622 219:307 220:1277 221:559 222:326 223:503


End of report
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