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, December 17, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 475307
Prefixes after maximum aggregation: 190241
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 236208
Total ASes present in the Internet Routing Table: 45729
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35473
Origin ASes announcing only one prefix: 16260
Transit ASes present in the Internet Routing Table: 5953
Transit-only ASes present in the Internet Routing Table: 168
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 53
Max AS path prepend of ASN ( 50404) 51
Prefixes from unregistered ASNs in the Routing Table: 1056
Unregistered ASNs in the Routing Table: 297
Number of 32-bit ASNs allocated by the RIRs: 5520
Number of 32-bit ASNs visible in the Routing Table: 4303
Prefixes from 32-bit ASNs in the Routing Table: 13550
Number of bogon 32-bit ASNs visible in the Routing Table: 1
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 1435
Number of addresses announced to Internet: 2660404892
Equivalent to 158 /8s, 146 /16s and 142 /24s
Percentage of available address space announced: 71.9
Percentage of allocated address space announced: 71.9
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.3
Total number of prefixes smaller than registry allocations: 165760

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

Prefixes being announced by APNIC Region ASes: 112999
Total APNIC prefixes after maximum aggregation: 34188
APNIC Deaggregation factor: 3.31
Prefixes being announced from the APNIC address blocks: 115267
Unique aggregates announced from the APNIC address blocks: 48127
APNIC Region origin ASes present in the Internet Routing Table: 4878
APNIC Prefixes per ASN: 23.63
APNIC Region origin ASes announcing only one prefix: 1207
APNIC Region transit ASes present in the Internet Routing Table: 837
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 38
Number of APNIC region 32-bit ASNs visible in the Routing Table: 793
Number of APNIC addresses announced to Internet: 729283264
Equivalent to 43 /8s, 119 /16s and 250 /24s
Percentage of available APNIC address space announced: 85.2

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: 163361
Total ARIN prefixes after maximum aggregation: 81851
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 164149
Unique aggregates announced from the ARIN address blocks: 75906
ARIN Region origin ASes present in the Internet Routing Table: 15929
ARIN Prefixes per ASN: 10.31
ARIN Region origin ASes announcing only one prefix: 5995
ARIN Region transit ASes present in the Internet Routing Table: 1663
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: 46
Number of ARIN addresses announced to Internet: 1075138688
Equivalent to 64 /8s, 21 /16s and 80 /24s
Percentage of available ARIN address space announced: 56.9

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: 119651
Total RIPE prefixes after maximum aggregation: 61311
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123373
Unique aggregates announced from the RIPE address blocks: 79264
RIPE Region origin ASes present in the Internet Routing Table: 17561
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8297
RIPE Region transit ASes present in the Internet Routing Table: 2826
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 53
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2527
Number of RIPE addresses announced to Internet: 656046308
Equivalent to 39 /8s, 26 /16s and 120 /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, 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: 53239
Total LACNIC prefixes after maximum aggregation: 10051
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 58669
Unique aggregates announced from the LACNIC address blocks: 27544
LACNIC Region origin ASes present in the Internet Routing Table: 2057
LACNIC Prefixes per ASN: 28.52
LACNIC Region origin ASes announcing only one prefix: 553
LACNIC Region transit ASes present in the Internet Routing Table: 400
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: 929
Number of LACNIC addresses announced to Internet: 146608440
Equivalent to 8 /8s, 189 /16s and 17 /24s
Percentage of available LACNIC address space announced: 87.4

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: 11752
Total AfriNIC prefixes after maximum aggregation: 2599
AfriNIC Deaggregation factor: 4.52
Prefixes being announced from the AfriNIC address blocks: 12414
Unique aggregates announced from the AfriNIC address blocks: 4239
AfriNIC Region origin ASes present in the Internet Routing Table: 696
AfriNIC Prefixes per ASN: 17.84
AfriNIC Region origin ASes announcing only one prefix: 208
AfriNIC Region transit ASes present in the Internet Routing Table: 145
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: 8
Number of AfriNIC addresses announced to Internet: 48634944
Equivalent to 2 /8s, 230 /16s and 28 /24s
Percentage of available AfriNIC address space announced: 48.3

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 2947 11558 951 Korea Telecom (KIX)
17974 2726 902 87 PT TELEKOMUNIKASI INDONESIA
7545 2120 319 111 TPG Internet Pty Ltd
4755 1801 392 191 TATA Communications formerly
9829 1556 1251 42 BSNL National Internet Backbo
9583 1322 102 544 Sify Limited
9498 1229 309 72 BHARTI Airtel Ltd.
7552 1176 1080 13 Vietel Corporation
4808 1142 2119 341 CNCGROUP IP network: China169
24560 1097 382 167 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 3030 3688 53 BellSouth.net Inc.
22773 2301 2939 138 Cox Communications, Inc.
1785 2143 686 129 PaeTec Communications, Inc.
18566 2050 379 178 MegaPath Corporation
20115 1680 1661 596 Charter Communications
4323 1631 1081 413 Time Warner Telecom
701 1508 11144 779 MCI Communications Services,
30036 1375 309 574 Mediacom Communications Corp
7018 1311 17746 856 AT&T WorldNet Services
6983 1294 756 580 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 1955 544 16 OJSC "Vimpelcom"
34984 1367 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1215 460 914 Akamai Technologies European
31148 1011 45 19 FreeNet ISP
13188 898 99 47 TOV "Bank-Inform"
6849 859 363 38 JSC UKRTELECOM,
8551 845 370 38 Bezeq International
6830 772 2327 425 UPC Distribution Services
12479 682 798 53 Uni2 Autonomous System
35228 551 246 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 3435 1837 93 NET Servicos de Comunicao S.A
10620 2690 435 209 Telmex Colombia S.A.
18881 1778 908 20 Global Village Telecom
7303 1741 1163 228 Telecom Argentina Stet-France
8151 1372 2857 428 UniNet S.A. de C.V.
11830 862 363 23 Instituto Costarricense de El
27947 858 93 89 Telconet S.A
6147 789 373 27 Telefonica Del Peru
6503 789 434 59 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 1819 112 5 Sudanese Mobile Telephone (ZA
24863 873 338 26 LINKdotNET AS number
6713 598 653 27 Itissalat Al-MAGHRIB
8452 421 956 9 TEDATA
24835 298 144 9 RAYA Telecom - Egypt
3741 247 921 209 The Internet Solution
36992 246 525 29 Etisalat MISR
29571 238 21 14 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 3435 1837 93 NET Servicos de Comunicao S.A
6389 3030 3688 53 BellSouth.net Inc.
4766 2947 11558 951 Korea Telecom (KIX)
17974 2726 902 87 PT TELEKOMUNIKASI INDONESIA
10620 2690 435 209 Telmex Colombia S.A.
22773 2301 2939 138 Cox Communications, Inc.
1785 2143 686 129 PaeTec Communications, Inc.
7545 2120 319 111 TPG Internet Pty Ltd
18566 2050 379 178 MegaPath Corporation
8402 1955 544 16 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 3030 2977 BellSouth.net Inc.
17974 2726 2639 PT TELEKOMUNIKASI INDONESIA
10620 2690 2481 Telmex Colombia S.A.
22773 2301 2163 Cox Communications, Inc.
1785 2143 2014 PaeTec Communications, Inc.
7545 2120 2009 TPG Internet Pty Ltd
4766 2947 1996 Korea Telecom (KIX)
8402 1955 1939 OJSC "Vimpelcom"
18566 2050 1872 MegaPath Corporation
36998 1819 1814 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 46887 Lightower Fiber Netw
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
62861 UNALLOCATED 12.37.197.0/24 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 Communications

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
23.91.0.0/19 40676 Psychz Networks
23.91.4.0/24 40676 Psychz Networks
23.91.14.0/24 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 37958 ChinaCache Networks ASN
23.91.112.0/21 32475 MidPhase Inc.
23.91.120.0/21 36351 SoftLayer Technologies Inc.
23.91.160.0/22 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
/13:474 /14:937 /15:1637 /16:12849 /17:6750 /18:11348
/19:23193 /20:33043 /21:35784 /22:50456 /23:43987 /24:252056
/25:818 /26:973 /27:447 /28:45 /29:70 /30:22
/31:0 /32:15

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

ASN No of nets Total ann. Description
18566 2005 2050 MegaPath Corporation
36998 1786 1819 Sudanese Mobile Telephone (ZA
6389 1699 3030 BellSouth.net Inc.
8402 1654 1955 OJSC "Vimpelcom"
22773 1551 2301 Cox Communications, Inc.
30036 1216 1375 Mediacom Communications Corp
1785 1163 2143 PaeTec Communications, Inc.
11492 1145 1182 Cable One
6983 1036 1294 ITC^Deltacom
22561 977 1253 Digital Teleport, Inc

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

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

1:920 2:872 3:3 4:16 5:783 6:21
8:615 12:1885 13:3 14:897 15:9 16:3
17:19 18:19 20:36 23:619 24:1754 27:1699
31:1499 32:45 33:2 34:5 36:105 37:1917
38:921 39:3 40:182 41:3211 42:239 44:14
46:2076 47:10 49:704 50:858 52:12 54:44
55:6 56:4 57:26 58:1149 59:588 60:369
61:1498 62:1227 63:1977 64:4399 65:2330 66:4137
67:2122 68:1085 69:3292 70:908 71:509 72:2022
74:2580 75:322 76:305 77:1206 78:1029 79:672
80:1283 81:1084 82:640 83:754 84:613 85:1268
86:384 87:1018 88:520 89:1568 90:151 91:5720
92:622 93:1613 94:2090 95:1482 96:520 97:350
98:1082 99:41 100:32 101:694 103:3851 105:532
106:144 107:247 108:540 109:2036 110:966 111:1135
112:607 113:812 114:752 115:1050 116:1008 117:831
118:1227 119:1284 120:340 121:771 122:1877 123:1262
124:1386 125:1440 128:641 129:230 130:356 131:668
132:355 133:159 134:309 135:72 136:277 137:252
138:350 139:172 140:206 141:345 142:551 143:403
144:498 145:90 146:555 147:436 148:789 149:359
150:153 151:486 152:414 153:207 154:50 155:522
156:311 157:368 158:285 159:787 160:359 161:460
162:947 163:251 164:628 165:583 166:281 167:639
168:1043 169:123 170:1147 171:185 172:12 173:1730
174:672 175:542 176:1325 177:2559 178:1890 179:334
180:1600 181:894 182:1424 183:474 184:622 185:1130
186:2688 187:1468 188:1978 189:1273 190:7299 192:7067
193:5470 194:4031 195:3375 196:1345 197:1075 198:4795
199:5513 200:6061 201:2534 202:9026 203:8926 204:4533
205:2626 206:2900 207:2817 208:3961 209:3707 210:3083
211:1630 212:2180 213:1973 214:875 215:84 216:5431
217:1721 218:625 219:320 220:1271 221:587 222:332
223:557

End of report
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