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.

Saturday, October 26, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 469650
Prefixes after maximum aggregation: 189128
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 233192
Total ASes present in the Internet Routing Table: 41245
Prefixes per ASN: 11.39
Origin-only ASes present in the Internet Routing Table: 35289
Origin ASes announcing only one prefix: 16270
Transit ASes present in the Internet Routing Table: 5948
Transit-only ASes present in the Internet Routing Table: 159
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: 711
Unregistered ASNs in the Routing Table: 190
Number of 32-bit ASNs allocated by the RIRs: 5262
Number of 32-bit ASNs visible in the Routing Table: 8
Prefixes from 32-bit ASNs in the Routing Table: 12516
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 851
Number of addresses announced to Internet: 2652049364
Equivalent to 158 /8s, 19 /16s and 15 /24s
Percentage of available address space announced: 71.6
Percentage of allocated address space announced: 71.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.1
Total number of prefixes smaller than registry allocations: 164022

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

Prefixes being announced by APNIC Region ASes: 111365
Total APNIC prefixes after maximum aggregation: 33812
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 113443
Unique aggregates announced from the APNIC address blocks: 46954
APNIC Region origin ASes present in the Internet Routing Table: 4876
APNIC Prefixes per ASN: 23.27
APNIC Region origin ASes announcing only one prefix: 1217
APNIC Region transit ASes present in the Internet Routing Table: 836
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: 2
Number of APNIC addresses announced to Internet: 729441984
Equivalent to 43 /8s, 122 /16s and 102 /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: 162717
Total ARIN prefixes after maximum aggregation: 81430
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163502
Unique aggregates announced from the ARIN address blocks: 75895
ARIN Region origin ASes present in the Internet Routing Table: 15903
ARIN Prefixes per ASN: 10.28
ARIN Region origin ASes announcing only one prefix: 6004
ARIN Region transit ASes present in the Internet Routing Table: 1668
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: 2
Number of ARIN addresses announced to Internet: 1073422208
Equivalent to 63 /8s, 251 /16s and 31 /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: 118646
Total RIPE prefixes after maximum aggregation: 61288
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 122268
Unique aggregates announced from the RIPE address blocks: 78934
RIPE Region origin ASes present in the Internet Routing Table: 17510
RIPE Prefixes per ASN: 6.98
RIPE Region origin ASes announcing only one prefix: 8298
RIPE Region transit ASes present in the Internet Routing Table: 2838
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 656680292
Equivalent to 39 /8s, 36 /16s and 37 /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: 52232
Total LACNIC prefixes after maximum aggregation: 9919
LACNIC Deaggregation factor: 5.27
Prefixes being announced from the LACNIC address blocks: 57332
Unique aggregates announced from the LACNIC address blocks: 26691
LACNIC Region origin ASes present in the Internet Routing Table: 2034
LACNIC Prefixes per ASN: 28.19
LACNIC Region origin ASes announcing only one prefix: 552
LACNIC Region transit ASes present in the Internet Routing Table: 388
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 35
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 2
Number of LACNIC addresses announced to Internet: 141106480
Equivalent to 8 /8s, 105 /16s and 29 /24s
Percentage of available LACNIC address space announced: 84.1

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: 11606
Total AfriNIC prefixes after maximum aggregation: 2554
AfriNIC Deaggregation factor: 4.54
Prefixes being announced from the AfriNIC address blocks: 12254
Unique aggregates announced from the AfriNIC address blocks: 4001
AfriNIC Region origin ASes present in the Internet Routing Table: 666
AfriNIC Prefixes per ASN: 18.40
AfriNIC Region origin ASes announcing only one prefix: 199
AfriNIC Region transit ASes present in the Internet Routing Table: 135
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: 1
Number of AfriNIC addresses announced to Internet: 48074752
Equivalent to 2 /8s, 221 /16s and 144 /24s
Percentage of available AfriNIC address space announced: 47.8

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 2937 11558 943 Korea Telecom (KIX)
17974 2717 903 89 PT TELEKOMUNIKASI INDONESIA
7545 2095 319 112 TPG Internet Pty Ltd
4755 1782 391 187 TATA Communications formerly
9829 1536 1241 45 BSNL National Internet Backbo
9498 1206 309 74 BHARTI Airtel Ltd.
9583 1187 90 513 Sify Limited
4808 1164 2127 341 CNCGROUP IP network: China169
7552 1156 1080 13 Vietel Corporation
24560 1091 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 3059 3689 58 BellSouth.net Inc.
22773 2185 2941 139 Cox Communications, Inc.
18566 2059 379 180 Covad Communications
1785 2035 684 130 PaeTec Communications, Inc.
20115 1682 1653 608 Charter Communications
4323 1615 1101 417 Time Warner Telecom
701 1509 11145 784 UUNET Technologies, Inc.
30036 1385 312 578 Mediacom Communications Corp
7018 1337 17779 866 AT&T WorldNet Services
6983 1293 755 578 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 1817 544 17 OJSC "Vimpelcom"
34984 1361 244 223 TELLCOM ILETISIM HIZMETLERI A
20940 1088 394 833 Akamai Technologies European
31148 1000 44 19 FreeNet ISP
13188 885 99 58 TOV "Bank-Inform"
6830 770 2327 423 UPC Distribution Services
8551 755 370 41 Bezeq International
12479 686 800 49 Uni2 Autonomous System
35228 542 246 16 Avatar Broadband Limited
34744 515 158 54 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 3459 1782 89 NET Servicos de Comunicao S.A
10620 2633 427 234 TVCABLE BOGOTA
7303 1725 1135 234 Telecom Argentina Stet-France
18881 1490 844 20 Global Village Telecom
8151 1347 2833 416 UniNet S.A. de C.V.
11830 865 364 15 Instituto Costarricense de El
27947 843 93 92 Telconet S.A
6503 788 434 62 AVANTEL, S.A.
7738 780 1498 36 Telecomunicacoes da Bahia S.A
3816 744 301 121 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 1854 112 5 Sudanese Mobile Telephone (ZA
24863 882 338 30 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 409 956 9 TEDATA
24835 294 144 9 RAYA Telecom - Egypt
3741 258 921 216 The Internet Solution
36992 226 501 29 Etisalat MISR
29571 224 17 12 Ci Telecom Autonomous system
15706 219 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 3459 1782 89 NET Servicos de Comunicao S.A
6389 3059 3689 58 BellSouth.net Inc.
4766 2937 11558 943 Korea Telecom (KIX)
17974 2717 903 89 PT TELEKOMUNIKASI INDONESIA
10620 2633 427 234 TVCABLE BOGOTA
22773 2185 2941 139 Cox Communications, Inc.
7545 2095 319 112 TPG Internet Pty Ltd
18566 2059 379 180 Covad Communications
1785 2035 684 130 PaeTec Communications, Inc.
36998 1854 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 3059 3001 BellSouth.net Inc.
17974 2717 2628 PT TELEKOMUNIKASI INDONESIA
10620 2633 2399 TVCABLE BOGOTA
22773 2185 2046 Cox Communications, Inc.
4766 2937 1994 Korea Telecom (KIX)
7545 2095 1983 TPG Internet Pty Ltd
1785 2035 1905 PaeTec Communications, Inc.
18566 2059 1879 Covad Communications
36998 1854 1849 Sudanese Mobile Telephone (ZA
8402 1817 1800 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
62734 UNALLOCATED 8.31.128.0/24 6939 Hurricane Electric
62773 UNALLOCATED 8.35.180.0/22 3356 Level 3 Communicatio
15132 UNALLOCATED 12.9.150.0/24 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

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.
23.91.80.0/20 21560 Capital Technology Services G
23.91.96.0/20 40676 Psychz Networks
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

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 /12:253
/13:480 /14:917 /15:1629 /16:12844 /17:6713 /18:11266
/19:22953 /20:32682 /21:35352 /22:49941 /23:43325 /24:248655
/25:870 /26:989 /27:468 /28:50 /29:79 /30:20
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2012 2059 Covad Communications
36998 1819 1854 Sudanese Mobile Telephone (ZA
6389 1709 3059 BellSouth.net Inc.
8402 1515 1817 OJSC "Vimpelcom"
22773 1451 2185 Cox Communications, Inc.
30036 1233 1385 Mediacom Communications Corp
11492 1197 1238 Cable One
1785 1085 2035 PaeTec Communications, Inc.
6983 1034 1293 ITC^Deltacom
22561 965 1241 Digital Teleport, Inc

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

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

1:858 2:805 3:3 4:17 5:1000 6:20
8:612 12:1889 13:3 14:884 15:11 16:3
17:17 18:19 20:21 23:498 24:1737 27:1593
31:1484 32:45 33:2 34:5 36:83 37:1842
38:914 39:5 40:181 41:3182 42:248 44:14
46:2021 47:8 49:680 50:839 52:12 54:39
55:5 56:2 57:26 58:1154 59:577 60:359
61:1471 62:1206 63:1978 64:4549 65:2338 66:4139
67:2120 68:1107 69:3271 70:870 71:491 72:2019
74:2564 75:328 76:306 77:1170 78:1070 79:651
80:1293 81:1016 82:657 83:635 84:589 85:1242
86:415 87:1009 88:563 89:1650 90:155 91:5663
92:618 93:1595 94:2032 95:1597 96:508 97:344
98:1047 99:42 100:31 101:613 103:3471 105:525
106:143 107:213 108:528 109:1915 110:955 111:1097
112:592 113:809 114:751 115:1032 116:981 117:838
118:1172 119:1294 120:371 121:747 122:1874 123:1251
124:1327 125:1433 128:644 129:237 130:328 131:662
132:348 133:158 134:553 135:67 136:278 137:269
138:350 139:176 140:198 141:334 142:529 143:420
144:501 145:89 146:518 147:406 148:760 149:356
150:158 151:592 152:410 153:204 154:49 155:484
156:286 157:424 158:281 159:771 160:356 161:455
162:807 163:227 164:635 165:574 166:258 167:625
168:1045 169:128 170:1121 171:181 172:25 173:1606
174:671 175:505 176:1270 177:2333 178:1947 179:192
180:1580 181:760 182:1341 183:454 184:664 185:950
186:2656 187:1499 188:1856 189:1288 190:7108 192:7104
193:5404 194:4043 195:3314 196:1318 197:1014 198:4741
199:5485 200:6068 201:2497 202:8969 203:8895 204:4523
205:2627 206:2842 207:2860 208:3985 209:3643 210:3012
211:1563 212:2142 213:1990 214:894 215:91 216:5367
217:1694 218:622 219:316 220:1280 221:566 222:325
223:506

End of report
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