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.

Thursday, December 5, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 06 Dec, 2013

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

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

BGP routing table entries examined: 474809
Prefixes after maximum aggregation: 189820
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 235073
Total ASes present in the Internet Routing Table: 45614
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 35422
Origin ASes announcing only one prefix: 16262
Transit ASes present in the Internet Routing Table: 5954
Transit-only ASes present in the Internet Routing Table: 171
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: 1023
Unregistered ASNs in the Routing Table: 288
Number of 32-bit ASNs allocated by the RIRs: 5446
Number of 32-bit ASNs visible in the Routing Table: 4238
Prefixes from 32-bit ASNs in the Routing Table: 13215
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: 1315
Number of addresses announced to Internet: 2656787004
Equivalent to 158 /8s, 91 /16s and 90 /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: 165438

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

Prefixes being announced by APNIC Region ASes: 113274
Total APNIC prefixes after maximum aggregation: 34108
APNIC Deaggregation factor: 3.32
Prefixes being announced from the APNIC address blocks: 115483
Unique aggregates announced from the APNIC address blocks: 47915
APNIC Region origin ASes present in the Internet Routing Table: 4876
APNIC Prefixes per ASN: 23.68
APNIC Region origin ASes announcing only one prefix: 1214
APNIC Region transit ASes present in the Internet Routing Table: 833
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 28
Number of APNIC region 32-bit ASNs visible in the Routing Table: 770
Number of APNIC addresses announced to Internet: 728633792
Equivalent to 43 /8s, 110 /16s and 17 /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: 163150
Total ARIN prefixes after maximum aggregation: 81750
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163877
Unique aggregates announced from the ARIN address blocks: 75735
ARIN Region origin ASes present in the Internet Routing Table: 15933
ARIN Prefixes per ASN: 10.29
ARIN Region origin ASes announcing only one prefix: 6002
ARIN Region transit ASes present in the Internet Routing Table: 1660
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: 41
Number of ARIN addresses announced to Internet: 1073175936
Equivalent to 63 /8s, 247 /16s and 93 /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: 119605
Total RIPE prefixes after maximum aggregation: 61151
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123362
Unique aggregates announced from the RIPE address blocks: 78981
RIPE Region origin ASes present in the Internet Routing Table: 17537
RIPE Prefixes per ASN: 7.03
RIPE Region origin ASes announcing only one prefix: 8287
RIPE Region transit ASes present in the Internet Routing Table: 2833
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: 2506
Number of RIPE addresses announced to Internet: 655956708
Equivalent to 39 /8s, 25 /16s and 26 /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: 53134
Total LACNIC prefixes after maximum aggregation: 10009
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58417
Unique aggregates announced from the LACNIC address blocks: 27363
LACNIC Region origin ASes present in the Internet Routing Table: 2043
LACNIC Prefixes per ASN: 28.59
LACNIC Region origin ASes announcing only one prefix: 553
LACNIC Region transit ASes present in the Internet Routing Table: 393
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: 913
Number of LACNIC addresses announced to Internet: 146058520
Equivalent to 8 /8s, 180 /16s and 173 /24s
Percentage of available LACNIC address space announced: 87.1

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: 11709
Total AfriNIC prefixes after maximum aggregation: 2577
AfriNIC Deaggregation factor: 4.54
Prefixes being announced from the AfriNIC address blocks: 12355
Unique aggregates announced from the AfriNIC address blocks: 4033
AfriNIC Region origin ASes present in the Internet Routing Table: 688
AfriNIC Prefixes per ASN: 17.96
AfriNIC Region origin ASes announcing only one prefix: 206
AfriNIC Region transit ASes present in the Internet Routing Table: 144
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: 8
Number of AfriNIC addresses announced to Internet: 48546816
Equivalent to 2 /8s, 228 /16s and 196 /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 2932 11557 940 Korea Telecom (KIX)
17974 2721 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2111 319 109 TPG Internet Pty Ltd
4755 1794 392 190 TATA Communications formerly
9829 1538 1245 45 BSNL National Internet Backbo
9583 1251 95 510 Sify Limited
9498 1218 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1143 2119 337 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 3040 3688 53 BellSouth.net Inc.
22773 2211 2939 137 Cox Communications, Inc.
18566 2053 379 178 MegaPath Corporation
1785 2048 686 131 PaeTec Communications, Inc.
20115 1684 1657 600 Charter Communications
4323 1638 1098 418 Time Warner Telecom
701 1511 11144 782 MCI Communications Services,
30036 1381 311 581 Mediacom Communications Corp
7018 1334 17779 873 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 1956 544 16 OJSC "Vimpelcom"
34984 1367 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1188 450 893 Akamai Technologies European
31148 1010 45 20 FreeNet ISP
13188 897 99 42 TOV "Bank-Inform"
6849 856 363 39 JSC UKRTELECOM,
8551 784 370 41 Bezeq International
6830 772 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 3420 1829 94 NET Servicos de Comunicao S.A
10620 2674 433 214 Telmex Colombia S.A.
7303 1733 1153 229 Telecom Argentina Stet-France
18881 1708 908 20 Global Village Telecom
8151 1368 2855 423 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 851 93 89 Telconet S.A
6147 795 373 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 871 338 26 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 412 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 247 921 209 The Internet Solution
29571 232 21 15 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 3420 1829 94 NET Servicos de Comunicao S.A
6389 3040 3688 53 BellSouth.net Inc.
4766 2932 11557 940 Korea Telecom (KIX)
17974 2721 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2674 433 214 Telmex Colombia S.A.
22773 2211 2939 137 Cox Communications, Inc.
7545 2111 319 109 TPG Internet Pty Ltd
18566 2053 379 178 MegaPath Corporation
1785 2048 686 131 PaeTec Communications, Inc.
8402 1956 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 3040 2987 BellSouth.net Inc.
17974 2721 2633 PT TELEKOMUNIKASI INDONESIA
10620 2674 2460 Telmex Colombia S.A.
22773 2211 2074 Cox Communications, Inc.
7545 2111 2002 TPG Internet Pty Ltd
4766 2932 1992 Korea Telecom (KIX)
8402 1956 1940 OJSC "Vimpelcom"
1785 2048 1917 PaeTec Communications, Inc.
18566 2053 1875 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 /14:932 /15:1637 /16:12838 /17:6793 /18:11343
/19:23180 /20:33046 /21:35699 /22:50497 /23:44072 /24:251407
/25:871 /26:999 /27:460 /28:49 /29:73 /30:20
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2008 2053 MegaPath Corporation
36998 1819 1854 Sudanese Mobile Telephone (ZA
6389 1700 3040 BellSouth.net Inc.
8402 1662 1956 OJSC "Vimpelcom"
22773 1464 2211 Cox Communications, Inc.
30036 1221 1381 Mediacom Communications Corp
11492 1183 1221 Cable One
1785 1088 2048 PaeTec Communications, Inc.
6983 1035 1293 ITC^Deltacom
22561 964 1240 Digital Teleport, Inc

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

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

1:920 2:866 3:3 4:17 5:807 6:21
8:613 12:1878 13:3 14:901 15:11 16:3
17:19 18:19 20:25 23:616 24:1769 27:1758
31:1520 32:45 33:2 34:5 36:96 37:1944
38:918 39:5 40:181 41:3247 42:230 44:14
46:2067 47:10 49:704 50:861 52:12 54:44
55:5 56:4 57:26 58:1204 59:581 60:367
61:1492 62:1249 63:1975 64:4400 65:2333 66:4141
67:2103 68:1088 69:3296 70:899 71:504 72:2006
74:2585 75:324 76:304 77:1214 78:1017 79:668
80:1280 81:1052 82:630 83:756 84:591 85:1255
86:382 87:1042 88:548 89:1565 90:155 91:5696
92:612 93:1611 94:2119 95:1536 96:513 97:349
98:1102 99:41 100:33 101:690 103:3780 105:530
106:143 107:223 108:537 109:2012 110:974 111:1122
112:669 113:803 114:751 115:1046 116:1009 117:831
118:1216 119:1288 120:394 121:764 122:1876 123:1268
124:1392 125:1435 128:636 129:234 130:355 131:668
132:353 133:158 134:305 135:72 136:276 137:269
138:352 139:171 140:200 141:341 142:549 143:409
144:502 145:90 146:553 147:434 148:757 149:367
150:153 151:485 152:414 153:207 154:45 155:513
156:307 157:424 158:284 159:784 160:360 161:459
162:913 163:231 164:629 165:582 166:275 167:639
168:1039 169:125 170:1125 171:185 172:11 173:1625
174:667 175:540 176:1316 177:2474 178:1875 179:310
180:1601 181:890 182:1404 183:477 184:619 185:1093
186:2645 187:1433 188:1956 189:1254 190:7293 192:7088
193:5428 194:4037 195:3359 196:1338 197:1035 198:4758
199:5512 200:6072 201:2528 202:8962 203:8873 204:4527
205:2656 206:2892 207:2795 208:3962 209:3665 210:3075
211:1610 212:2177 213:1991 214:887 215:84 216:5420
217:1714 218:636 219:318 220:1275 221:613 222:332
223:516

End of report
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