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, December 7, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 08 Dec, 2013

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

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

BGP routing table entries examined: 474086
Prefixes after maximum aggregation: 189870
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 235295
Total ASes present in the Internet Routing Table: 45632
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35426
Origin ASes announcing only one prefix: 16265
Transit ASes present in the Internet Routing Table: 5956
Transit-only ASes present in the Internet Routing Table: 172
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 103
Max AS path prepend of ASN ( 50404) 101
Prefixes from unregistered ASNs in the Routing Table: 1034
Unregistered ASNs in the Routing Table: 289
Number of 32-bit ASNs allocated by the RIRs: 5473
Number of 32-bit ASNs visible in the Routing Table: 4250
Prefixes from 32-bit ASNs in the Routing Table: 13293
Number of bogon 32-bit ASNs visible in the Routing Table: 1
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1347
Number of addresses announced to Internet: 2657199004
Equivalent to 158 /8s, 97 /16s and 163 /24s
Percentage of available address space announced: 71.8
Percentage of allocated address space announced: 71.8
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: 165459

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

Prefixes being announced by APNIC Region ASes: 112547
Total APNIC prefixes after maximum aggregation: 34142
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 114765
Unique aggregates announced from the APNIC address blocks: 48042
APNIC Region origin ASes present in the Internet Routing Table: 4872
APNIC Prefixes per ASN: 23.56
APNIC Region origin ASes announcing only one prefix: 1210
APNIC Region transit ASes present in the Internet Routing Table: 833
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 28
Number of APNIC region 32-bit ASNs visible in the Routing Table: 773
Number of APNIC addresses announced to Internet: 728728512
Equivalent to 43 /8s, 111 /16s and 131 /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: 163100
Total ARIN prefixes after maximum aggregation: 81697
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163832
Unique aggregates announced from the ARIN address blocks: 75736
ARIN Region origin ASes present in the Internet Routing Table: 15925
ARIN Prefixes per ASN: 10.29
ARIN Region origin ASes announcing only one prefix: 6004
ARIN Region transit ASes present in the Internet Routing Table: 1666
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: 44
Number of ARIN addresses announced to Internet: 1072894336
Equivalent to 63 /8s, 243 /16s and 17 /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: 119610
Total RIPE prefixes after maximum aggregation: 61206
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123354
Unique aggregates announced from the RIPE address blocks: 78983
RIPE Region origin ASes present in the Internet Routing Table: 17544
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8286
RIPE Region transit ASes present in the Internet Routing Table: 2831
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 103
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2508
Number of RIPE addresses announced to Internet: 656321764
Equivalent to 39 /8s, 30 /16s and 172 /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: 53100
Total LACNIC prefixes after maximum aggregation: 10008
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58443
Unique aggregates announced from the LACNIC address blocks: 27418
LACNIC Region origin ASes present in the Internet Routing Table: 2049
LACNIC Prefixes per ASN: 28.52
LACNIC Region origin ASes announcing only one prefix: 555
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: 918
Number of LACNIC addresses announced to Internet: 146257976
Equivalent to 8 /8s, 183 /16s and 184 /24s
Percentage of available LACNIC address space announced: 87.2

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: 11703
Total AfriNIC prefixes after maximum aggregation: 2583
AfriNIC Deaggregation factor: 4.53
Prefixes being announced from the AfriNIC address blocks: 12345
Unique aggregates announced from the AfriNIC address blocks: 4051
AfriNIC Region origin ASes present in the Internet Routing Table: 691
AfriNIC Prefixes per ASN: 17.87
AfriNIC Region origin ASes announcing only one prefix: 210
AfriNIC Region transit ASes present in the Internet Routing Table: 144
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: 7
Number of AfriNIC addresses announced to Internet: 48546624
Equivalent to 2 /8s, 228 /16s and 195 /24s
Percentage of available AfriNIC address space announced: 48.2

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 2955 11559 952 Korea Telecom (KIX)
17974 2721 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2112 319 110 TPG Internet Pty Ltd
4755 1795 392 190 TATA Communications formerly
9829 1541 1246 45 BSNL National Internet Backbo
9583 1418 113 570 Sify Limited
9498 1218 309 72 BHARTI Airtel Ltd.
7552 1169 1080 13 Vietel Corporation
4808 1144 2120 338 CNCGROUP IP network: China169
24560 1098 382 166 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 3038 3688 53 BellSouth.net Inc.
22773 2296 2939 137 Cox Communications, Inc.
18566 2052 379 178 MegaPath Corporation
1785 2048 686 131 PaeTec Communications, Inc.
20115 1680 1656 596 Charter Communications
4323 1638 1098 418 Time Warner Telecom
701 1510 11144 781 MCI Communications Services,
30036 1380 311 580 Mediacom Communications Corp
7018 1327 17779 867 AT&T WorldNet Services
6983 1292 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 1917 544 16 OJSC "Vimpelcom"
34984 1367 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1189 450 893 Akamai Technologies European
31148 1010 45 20 FreeNet ISP
13188 897 99 42 TOV "Bank-Inform"
6849 855 363 39 JSC UKRTELECOM,
8551 786 370 41 Bezeq International
6830 771 2327 424 UPC Distribution Services
12479 679 798 53 Uni2 Autonomous System
35228 549 246 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 3419 1829 94 NET Servicos de Comunicao S.A
10620 2693 436 200 Telmex Colombia S.A.
7303 1736 1161 231 Telecom Argentina Stet-France
18881 1709 908 20 Global Village Telecom
8151 1367 2855 425 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 848 93 89 Telconet S.A
6147 791 373 27 Telefonica Del Peru
7738 780 1498 36 Telecomunicacoes da Bahia S.A
6503 776 434 60 AVANTEL, 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 1854 112 5 Sudanese Mobile Telephone (ZA
24863 872 338 26 LINKdotNET AS number
6713 547 633 26 Itissalat Al-MAGHRIB
8452 414 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 247 921 209 The Internet Solution
29571 228 21 13 Ci Telecom Autonomous system
36992 222 501 29 Etisalat MISR
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 3419 1829 94 NET Servicos de Comunicao S.A
6389 3038 3688 53 BellSouth.net Inc.
4766 2955 11559 952 Korea Telecom (KIX)
17974 2721 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2693 436 200 Telmex Colombia S.A.
22773 2296 2939 137 Cox Communications, Inc.
7545 2112 319 110 TPG Internet Pty Ltd
18566 2052 379 178 MegaPath Corporation
1785 2048 686 131 PaeTec Communications, Inc.
8402 1917 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 3038 2985 BellSouth.net Inc.
17974 2721 2633 PT TELEKOMUNIKASI INDONESIA
10620 2693 2493 Telmex Colombia S.A.
22773 2296 2159 Cox Communications, Inc.
4766 2955 2003 Korea Telecom (KIX)
7545 2112 2002 TPG Internet Pty Ltd
1785 2048 1917 PaeTec Communications, Inc.
8402 1917 1901 OJSC "Vimpelcom"
18566 2052 1874 MegaPath Corporation
36998 1854 1849 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

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
23.91.4.0/24 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.
23.91.160.0/19 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
/13:476 /14:933 /15:1636 /16:12842 /17:6791 /18:11328
/19:23154 /20:32971 /21:35653 /22:50214 /23:43947 /24:251312
/25:829 /26:989 /27:452 /28:49 /29:72 /30:21
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2007 2052 MegaPath Corporation
36998 1819 1854 Sudanese Mobile Telephone (ZA
6389 1700 3038 BellSouth.net Inc.
8402 1625 1917 OJSC "Vimpelcom"
22773 1548 2296 Cox Communications, Inc.
30036 1220 1380 Mediacom Communications Corp
11492 1183 1224 Cable One
1785 1088 2048 PaeTec Communications, Inc.
6983 1034 1292 ITC^Deltacom
22561 965 1240 Digital Teleport, Inc

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

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

1:925 2:868 3:3 4:16 5:810 6:21
8:612 12:1878 13:3 14:899 15:11 16:3
17:19 18:19 20:25 23:616 24:1757 27:1704
31:1520 32:45 33:2 34:5 36:96 37:1945
38:915 39:5 40:181 41:3227 42:231 44:13
46:2073 47:10 49:700 50:864 52:12 54:44
55:5 56:4 57:26 58:1146 59:585 60:368
61:1495 62:1248 63:1972 64:4400 65:2334 66:4146
67:2111 68:1095 69:3295 70:909 71:504 72:2019
74:2584 75:324 76:304 77:1217 78:1016 79:669
80:1280 81:1048 82:622 83:752 84:590 85:1257
86:382 87:1038 88:548 89:1565 90:154 91:5705
92:620 93:1608 94:2114 95:1510 96:515 97:349
98:1131 99:41 100:33 101:689 103:3793 105:530
106:143 107:229 108:538 109:2007 110:970 111:1122
112:594 113:801 114:752 115:1043 116:1007 117:831
118:1221 119:1296 120:339 121:763 122:1871 123:1268
124:1373 125:1439 128:634 129:233 130:355 131:662
132:350 133:158 134:308 135:72 136:276 137:270
138:351 139:171 140:199 141:343 142:549 143:402
144:500 145:90 146:555 147:439 148:771 149:368
150:153 151:486 152:415 153:207 154:45 155:515
156:306 157:419 158:285 159:775 160:362 161:458
162:911 163:225 164:629 165:581 166:275 167:637
168:1043 169:124 170:1128 171:185 172:11 173:1624
174:664 175:540 176:1323 177:2510 178:1875 179:316
180:1605 181:883 182:1405 183:479 184:621 185:1104
186:2647 187:1460 188:1958 189:1258 190:7309 192:7064
193:5429 194:4035 195:3358 196:1337 197:1056 198:4755
199:5512 200:6068 201:2527 202:8972 203:8890 204:4532
205:2646 206:2893 207:2805 208:3960 209:3666 210:3079
211:1629 212:2180 213:1994 214:889 215:84 216:5428
217:1715 218:636 219:319 220:1268 221:587 222:332
223:521

End of report
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