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.

Sunday, November 17, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 18 Nov, 2013

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

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

BGP routing table entries examined: 472704
Prefixes after maximum aggregation: 189311
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234478
Total ASes present in the Internet Routing Table: 45439
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 35338
Origin ASes announcing only one prefix: 16273
Transit ASes present in the Internet Routing Table: 5950
Transit-only ASes present in the Internet Routing Table: 166
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 35
Max AS path prepend of ASN ( 55644) 31
Prefixes from unregistered ASNs in the Routing Table: 903
Unregistered ASNs in the Routing Table: 273
Number of 32-bit ASNs allocated by the RIRs: 5363
Number of 32-bit ASNs visible in the Routing Table: 4151
Prefixes from 32-bit ASNs in the Routing Table: 12978
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1079
Number of addresses announced to Internet: 2654675224
Equivalent to 158 /8s, 59 /16s and 33 /24s
Percentage of available address space announced: 71.7
Percentage of allocated address space announced: 71.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.2
Total number of prefixes smaller than registry allocations: 165122

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

Prefixes being announced by APNIC Region ASes: 111786
Total APNIC prefixes after maximum aggregation: 33935
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 114000
Unique aggregates announced from the APNIC address blocks: 47694
APNIC Region origin ASes present in the Internet Routing Table: 4870
APNIC Prefixes per ASN: 23.41
APNIC Region origin ASes announcing only one prefix: 1215
APNIC Region transit ASes present in the Internet Routing Table: 832
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 35
Number of APNIC region 32-bit ASNs visible in the Routing Table: 742
Number of APNIC addresses announced to Internet: 729821120
Equivalent to 43 /8s, 128 /16s and 47 /24s
Percentage of available APNIC address space announced: 85.3

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: 163075
Total ARIN prefixes after maximum aggregation: 81635
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163880
Unique aggregates announced from the ARIN address blocks: 76067
ARIN Region origin ASes present in the Internet Routing Table: 15912
ARIN Prefixes per ASN: 10.30
ARIN Region origin ASes announcing only one prefix: 6001
ARIN Region transit ASes present in the Internet Routing Table: 1654
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 37
Number of ARIN addresses announced to Internet: 1073487488
Equivalent to 63 /8s, 252 /16s and 30 /24s
Percentage of available ARIN address space announced: 56.8

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: 119432
Total RIPE prefixes after maximum aggregation: 61010
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123086
Unique aggregates announced from the RIPE address blocks: 78816
RIPE Region origin ASes present in the Internet Routing Table: 17517
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8302
RIPE Region transit ASes present in the Internet Routing Table: 2835
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 31
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2478
Number of RIPE addresses announced to Internet: 656648932
Equivalent to 39 /8s, 35 /16s and 170 /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: 53134
Total LACNIC prefixes after maximum aggregation: 9998
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58347
Unique aggregates announced from the LACNIC address blocks: 27044
LACNIC Region origin ASes present in the Internet Routing Table: 2039
LACNIC Prefixes per ASN: 28.62
LACNIC Region origin ASes announcing only one prefix: 555
LACNIC Region transit ASes present in the Internet Routing Table: 399
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 35
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 888
Number of LACNIC addresses announced to Internet: 143159284
Equivalent to 8 /8s, 136 /16s and 111 /24s
Percentage of available LACNIC address space announced: 85.3

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: 11685
Total AfriNIC prefixes after maximum aggregation: 2577
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12312
Unique aggregates announced from the AfriNIC address blocks: 3986
AfriNIC Region origin ASes present in the Internet Routing Table: 677
AfriNIC Prefixes per ASN: 18.19
AfriNIC Region origin ASes announcing only one prefix: 200
AfriNIC Region transit ASes present in the Internet Routing Table: 140
Average AfriNIC Region AS path length visible: 4.7
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: 47825920
Equivalent to 2 /8s, 217 /16s and 196 /24s
Percentage of available AfriNIC address space announced: 47.5

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 2931 11557 943 Korea Telecom (KIX)
17974 2713 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2109 319 111 TPG Internet Pty Ltd
4755 1789 392 190 TATA Communications formerly
9829 1544 1245 45 BSNL National Internet Backbo
9583 1246 95 509 Sify Limited
9498 1216 309 74 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1146 2124 339 CNCGROUP IP network: China169
24560 1096 380 163 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 3049 3688 54 BellSouth.net Inc.
22773 2199 2939 138 Cox Communications, Inc.
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
20115 1681 1654 607 Charter Communications
4323 1638 1098 418 Time Warner Telecom
701 1506 11146 782 MCI Communications Services,
30036 1382 311 583 Mediacom Communications Corp
7018 1329 17778 868 AT&T WorldNet Services
6983 1294 756 579 ITC^Deltacom

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 1978 544 17 OJSC "Vimpelcom"
34984 1376 245 229 TELLCOM ILETISIM HIZMETLERI A
20940 1137 421 860 Akamai Technologies European
31148 1005 45 19 FreeNet ISP
13188 895 99 48 TOV "Bank-Inform"
6849 861 356 30 JSC UKRTELECOM,
8551 787 370 41 Bezeq International
6830 774 2328 426 UPC Distribution Services
12479 680 798 55 Uni2 Autonomous System
35228 547 246 16 Avatar Broadband Limited

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 3414 1793 87 NET Servicos de Comunicao S.A
10620 2662 432 219 Telmex Colombia S.A.
7303 1728 1150 231 Telecom Argentina Stet-France
18881 1621 908 20 Global Village Telecom
8151 1362 2853 416 UniNet S.A. de C.V.
11830 866 364 15 Instituto Costarricense de El
27947 844 93 90 Telconet S.A
6147 812 373 27 Telefonica Del Peru
6503 793 434 62 AVANTEL, S.A.
7738 780 1498 36 Telecomunicacoes da Bahia S.A

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 888 338 26 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 413 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 256 921 214 The Internet Solution
36992 229 501 29 Etisalat MISR
29571 224 17 12 Ci Telecom Autonomous system
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 3414 1793 87 NET Servicos de Comunicao S.A
6389 3049 3688 54 BellSouth.net Inc.
4766 2931 11557 943 Korea Telecom (KIX)
17974 2713 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2662 432 219 Telmex Colombia S.A.
22773 2199 2939 138 Cox Communications, Inc.
7545 2109 319 111 TPG Internet Pty Ltd
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
8402 1978 544 17 OJSC "Vimpelcom"

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 3049 2995 BellSouth.net Inc.
17974 2713 2625 PT TELEKOMUNIKASI INDONESIA
10620 2662 2443 Telmex Colombia S.A.
22773 2199 2061 Cox Communications, Inc.
7545 2109 1998 TPG Internet Pty Ltd
4766 2931 1988 Korea Telecom (KIX)
8402 1978 1961 OJSC "Vimpelcom"
1785 2039 1909 PaeTec Communications, Inc.
18566 2057 1879 MegaPath Corporation
36998 1864 1859 Sudanese Mobile Telephone (ZA

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

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

Bad AS Designation Network Transit AS Description
62828 UNALLOCATED 8.21.130.0/24 4323 Time Warner Telecom
62850 UNALLOCATED 8.25.147.0/24 3356 Level 3 Communicatio
62734 UNALLOCATED 8.31.128.0/24 6939 Hurricane Electric
62773 UNALLOCATED 8.35.180.0/22 3356 Level 3 Communicatio
65160 PRIVATE 12.1.58.0/24 17361 Sungard Trading Syst
65160 PRIVATE 12.1.59.0/24 17361 Sungard Trading Syst
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
62861 UNALLOCATED 12.37.197.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 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
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.
23.91.32.0/19 36315 Servpac Inc.
23.91.80.0/20 21560 Capital Technology Services G
23.91.96.0/20 37958 ChinaCache Networks ASN
23.91.112.0/21 32475 MidPhase Inc.
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c
23.91.160.0/22 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
23.91.172.0/22 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 /11:92 /12:254
/13:474 /14:922 /15:1628 /16:12823 /17:6758 /18:11328
/19:23084 /20:32875 /21:35563 /22:49951 /23:43831 /24:250577
/25:865 /26:991 /27:466 /28:50 /29:79 /30:21
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2011 2057 MegaPath Corporation
36998 1829 1864 Sudanese Mobile Telephone (ZA
6389 1704 3049 BellSouth.net Inc.
8402 1645 1978 OJSC "Vimpelcom"
22773 1458 2199 Cox Communications, Inc.
30036 1228 1382 Mediacom Communications Corp
11492 1193 1231 Cable One
1785 1086 2039 PaeTec Communications, Inc.
6983 1035 1294 ITC^Deltacom
22561 965 1242 Digital Teleport, Inc

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

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

1:899 2:866 3:3 4:17 5:1029 6:21
8:620 12:1884 13:3 14:898 15:11 16:3
17:15 18:19 20:21 23:557 24:1746 27:1627
31:1506 32:44 33:2 34:5 36:86 37:1925
38:919 39:5 40:182 41:3243 42:273 44:14
46:2036 47:10 49:689 50:848 52:12 54:43
55:7 56:4 57:26 58:1166 59:573 60:380
61:1470 62:1242 63:1980 64:4332 65:2346 66:4158
67:2113 68:1108 69:3293 70:874 71:489 72:2044
74:2571 75:325 76:307 77:1158 78:1067 79:675
80:1298 81:1038 82:646 83:659 84:591 85:1255
86:383 87:1005 88:560 89:1557 90:150 91:5667
92:591 93:1607 94:2063 95:1629 96:512 97:350
98:1043 99:41 100:32 101:649 103:3619 105:527
106:140 107:217 108:536 109:1962 110:972 111:1115
112:594 113:809 114:749 115:1053 116:1005 117:823
118:1177 119:1276 120:336 121:751 122:1873 123:1257
124:1402 125:1432 128:673 129:229 130:353 131:663
132:359 133:158 134:558 135:72 136:282 137:250
138:348 139:177 140:198 141:331 142:545 143:400
144:497 145:90 146:530 147:409 148:780 149:368
150:138 151:653 152:411 153:205 154:52 155:495
156:294 157:420 158:280 159:782 160:361 161:458
162:858 163:222 164:634 165:588 166:260 167:635
168:1043 169:125 170:1116 171:184 172:27 173:1586
174:689 175:527 176:1325 177:2469 178:1966 179:298
180:1590 181:872 182:1379 183:466 184:659 185:1028
186:2625 187:1472 188:1882 189:1264 190:7304 192:7055
193:5427 194:4040 195:3369 196:1327 197:1035 198:4757
199:5488 200:6068 201:2518 202:8971 203:8872 204:4538
205:2642 206:2838 207:2836 208:3998 209:3659 210:3034
211:1567 212:2155 213:1968 214:900 215:91 216:5440
217:1692 218:627 219:323 220:1277 221:579 222:326
223:508

End of report
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