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, November 18, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 19 Nov, 2013

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

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

BGP routing table entries examined: 472885
Prefixes after maximum aggregation: 189300
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234615
Total ASes present in the Internet Routing Table: 45461
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 35338
Origin ASes announcing only one prefix: 16271
Transit ASes present in the Internet Routing Table: 5962
Transit-only ASes present in the Internet Routing Table: 165
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: 904
Unregistered ASNs in the Routing Table: 274
Number of 32-bit ASNs allocated by the RIRs: 5363
Number of 32-bit ASNs visible in the Routing Table: 4161
Prefixes from 32-bit ASNs in the Routing Table: 13014
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1089
Number of addresses announced to Internet: 2654686744
Equivalent to 158 /8s, 59 /16s and 78 /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: 165266

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

Prefixes being announced by APNIC Region ASes: 111797
Total APNIC prefixes after maximum aggregation: 33937
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 114016
Unique aggregates announced from the APNIC address blocks: 47695
APNIC Region origin ASes present in the Internet Routing Table: 4874
APNIC Prefixes per ASN: 23.39
APNIC Region origin ASes announcing only one prefix: 1223
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: 35
Number of APNIC region 32-bit ASNs visible in the Routing Table: 741
Number of APNIC addresses announced to Internet: 729620672
Equivalent to 43 /8s, 125 /16s and 32 /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: 162968
Total ARIN prefixes after maximum aggregation: 81585
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163783
Unique aggregates announced from the ARIN address blocks: 76054
ARIN Region origin ASes present in the Internet Routing Table: 15915
ARIN Prefixes per ASN: 10.29
ARIN Region origin ASes announcing only one prefix: 5999
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: 1073552256
Equivalent to 63 /8s, 253 /16s and 27 /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: 119544
Total RIPE prefixes after maximum aggregation: 61027
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123172
Unique aggregates announced from the RIPE address blocks: 78875
RIPE Region origin ASes present in the Internet Routing Table: 17516
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8293
RIPE Region transit ASes present in the Internet Routing Table: 2843
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: 2480
Number of RIPE addresses announced to Internet: 656425188
Equivalent to 39 /8s, 32 /16s and 64 /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: 53154
Total LACNIC prefixes after maximum aggregation: 9989
LACNIC Deaggregation factor: 5.32
Prefixes being announced from the LACNIC address blocks: 58397
Unique aggregates announced from the LACNIC address blocks: 27067
LACNIC Region origin ASes present in the Internet Routing Table: 2037
LACNIC Prefixes per ASN: 28.67
LACNIC Region origin ASes announcing only one prefix: 552
LACNIC Region transit ASes present in the Internet Routing Table: 398
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: 897
Number of LACNIC addresses announced to Internet: 143164404
Equivalent to 8 /8s, 136 /16s and 131 /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: 11793
Total AfriNIC prefixes after maximum aggregation: 2605
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12428
Unique aggregates announced from the AfriNIC address blocks: 4046
AfriNIC Region origin ASes present in the Internet Routing Table: 685
AfriNIC Prefixes per ASN: 18.14
AfriNIC Region origin ASes announcing only one prefix: 204
AfriNIC Region transit ASes present in the Internet Routing Table: 142
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: 48118016
Equivalent to 2 /8s, 222 /16s and 57 /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 2930 11557 943 Korea Telecom (KIX)
17974 2713 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2109 319 110 TPG Internet Pty Ltd
4755 1790 392 190 TATA Communications formerly
9829 1544 1245 45 BSNL National Internet Backbo
9583 1246 95 509 Sify Limited
9498 1211 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1142 2124 342 CNCGROUP IP network: China169
24560 1095 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 2197 2939 138 Cox Communications, Inc.
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
20115 1682 1654 607 Charter Communications
4323 1640 1098 418 Time Warner Telecom
701 1507 11146 783 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 1981 544 16 OJSC "Vimpelcom"
34984 1365 244 223 TELLCOM ILETISIM HIZMETLERI A
20940 1144 425 865 Akamai Technologies European
31148 1005 45 19 FreeNet ISP
13188 895 99 48 TOV "Bank-Inform"
6849 861 356 30 JSC UKRTELECOM,
8551 786 370 41 Bezeq International
6830 774 2328 426 UPC Distribution Services
12479 680 798 55 Uni2 Autonomous System
35228 548 246 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 3412 1793 87 NET Servicos de Comunicao S.A
10620 2666 432 219 Telmex Colombia S.A.
7303 1728 1150 231 Telecom Argentina Stet-France
18881 1624 908 20 Global Village Telecom
8151 1361 2853 415 UniNet S.A. de C.V.
11830 866 364 15 Instituto Costarricense de El
27947 846 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 415 956 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 3412 1793 87 NET Servicos de Comunicao S.A
6389 3049 3688 54 BellSouth.net Inc.
4766 2930 11557 943 Korea Telecom (KIX)
17974 2713 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2666 432 219 Telmex Colombia S.A.
22773 2197 2939 138 Cox Communications, Inc.
7545 2109 319 110 TPG Internet Pty Ltd
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
8402 1981 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 3049 2995 BellSouth.net Inc.
17974 2713 2625 PT TELEKOMUNIKASI INDONESIA
10620 2666 2447 Telmex Colombia S.A.
22773 2197 2059 Cox Communications, Inc.
7545 2109 1999 TPG Internet Pty Ltd
4766 2930 1987 Korea Telecom (KIX)
8402 1981 1965 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.
23.91.0.0/19 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.
23.91.160.0/19 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 /12:254
/13:474 /14:922 /15:1625 /16:12826 /17:6766 /18:11343
/19:23097 /20:32811 /21:35588 /22:49983 /23:43845 /24:250703
/25:872 /26:993 /27:467 /28:51 /29:80 /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 1649 1981 OJSC "Vimpelcom"
22773 1456 2197 Cox Communications, Inc.
30036 1228 1382 Mediacom Communications Corp
11492 1194 1232 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)
----------------------------------------------

1:900 2:901 3:3 4:17 5:1029 6:21
8:620 12:1886 13:3 14:900 15:11 16:3
17:16 18:19 20:21 23:562 24:1736 27:1628
31:1505 32:45 33:2 34:5 36:86 37:1927
38:920 39:5 40:182 41:3256 42:274 44:14
46:2037 47:10 49:681 50:857 52:12 54:43
55:6 56:4 57:26 58:1167 59:576 60:379
61:1475 62:1242 63:1981 64:4329 65:2346 66:4155
67:2109 68:1097 69:3292 70:873 71:489 72:2042
74:2570 75:325 76:307 77:1159 78:1068 79:673
80:1296 81:1047 82:649 83:675 84:589 85:1255
86:383 87:1007 88:560 89:1558 90:152 91:5673
92:612 93:1605 94:2062 95:1626 96:512 97:349
98:1042 99:41 100:32 101:647 103:3626 105:527
106:140 107:219 108:533 109:1979 110:974 111:1117
112:594 113:808 114:750 115:1050 116:1007 117:823
118:1182 119:1270 120:336 121:750 122:1872 123:1257
124:1410 125:1438 128:675 129:229 130:337 131:665
132:359 133:158 134:558 135:72 136:283 137:249
138:349 139:177 140:199 141:331 142:543 143:413
144:497 145:90 146:531 147:392 148:779 149:369
150:138 151:653 152:412 153:205 154:52 155:497
156:294 157:421 158:280 159:782 160:361 161:456
162:857 163:222 164:637 165:587 166:261 167:634
168:1043 169:125 170:1119 171:183 172:27 173:1588
174:689 175:527 176:1328 177:2478 178:1983 179:282
180:1591 181:876 182:1378 183:467 184:638 185:1037
186:2628 187:1480 188:1883 189:1273 190:7309 192:7057
193:5422 194:4039 195:3372 196:1344 197:1040 198:4757
199:5451 200:6063 201:2521 202:8960 203:8888 204:4537
205:2634 206:2836 207:2834 208:3992 209:3656 210:3034
211:1567 212:2153 213:1999 214:900 215:91 216:5437
217:1692 218:627 219:316 220:1277 221:579 222:326
223:505

End of report
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