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 3, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 473856
Prefixes after maximum aggregation: 189715
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234893
Total ASes present in the Internet Routing Table: 45609
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35430
Origin ASes announcing only one prefix: 16270
Transit ASes present in the Internet Routing Table: 5949
Transit-only ASes present in the Internet Routing Table: 169
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: 1009
Unregistered ASNs in the Routing Table: 285
Number of 32-bit ASNs allocated by the RIRs: 5437
Number of 32-bit ASNs visible in the Routing Table: 4230
Prefixes from 32-bit ASNs in the Routing Table: 13398
Number of bogon 32-bit ASNs visible in the Routing Table: 2
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1270
Number of addresses announced to Internet: 2657433660
Equivalent to 158 /8s, 101 /16s and 56 /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: 165236

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

Prefixes being announced by APNIC Region ASes: 112474
Total APNIC prefixes after maximum aggregation: 34114
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 114785
Unique aggregates announced from the APNIC address blocks: 47959
APNIC Region origin ASes present in the Internet Routing Table: 4874
APNIC Prefixes per ASN: 23.55
APNIC Region origin ASes announcing only one prefix: 1213
APNIC Region transit ASes present in the Internet Routing Table: 836
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: 768
Number of APNIC addresses announced to Internet: 728662208
Equivalent to 43 /8s, 110 /16s and 128 /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: 163066
Total ARIN prefixes after maximum aggregation: 81685
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163799
Unique aggregates announced from the ARIN address blocks: 75747
ARIN Region origin ASes present in the Internet Routing Table: 15932
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: 1659
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: 40
Number of ARIN addresses announced to Internet: 1073774208
Equivalent to 64 /8s, 0 /16s and 126 /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: 119487
Total RIPE prefixes after maximum aggregation: 61127
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123291
Unique aggregates announced from the RIPE address blocks: 78855
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: 8292
RIPE Region transit ASes present in the Internet Routing Table: 2828
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: 2507
Number of RIPE addresses announced to Internet: 656256484
Equivalent to 39 /8s, 29 /16s and 173 /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: 53009
Total LACNIC prefixes after maximum aggregation: 9988
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58341
Unique aggregates announced from the LACNIC address blocks: 27283
LACNIC Region origin ASes present in the Internet Routing Table: 2049
LACNIC Prefixes per ASN: 28.47
LACNIC Region origin ASes announcing only one prefix: 552
LACNIC Region transit ASes present in the Internet Routing Table: 394
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: 908
Number of LACNIC addresses announced to Internet: 145974296
Equivalent to 8 /8s, 179 /16s and 100 /24s
Percentage of available LACNIC address space announced: 87.0

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: 11713
Total AfriNIC prefixes after maximum aggregation: 2582
AfriNIC Deaggregation factor: 4.54
Prefixes being announced from the AfriNIC address blocks: 12370
Unique aggregates announced from the AfriNIC address blocks: 4031
AfriNIC Region origin ASes present in the Internet Routing Table: 687
AfriNIC Prefixes per ASN: 18.01
AfriNIC Region origin ASes announcing only one prefix: 209
AfriNIC Region transit ASes present in the Internet Routing Table: 143
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: 7
Number of AfriNIC addresses announced to Internet: 48547328
Equivalent to 2 /8s, 228 /16s and 198 /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 2931 11557 940 Korea Telecom (KIX)
17974 2712 902 88 PT TELEKOMUNIKASI INDONESIA
7545 2113 319 111 TPG Internet Pty Ltd
4755 1794 392 190 TATA Communications formerly
9829 1541 1244 47 BSNL National Internet Backbo
9583 1251 95 510 Sify Limited
9498 1217 309 73 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1146 2119 337 CNCGROUP IP network: China169
24560 1102 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 3042 3688 53 BellSouth.net Inc.
22773 2209 2939 137 Cox Communications, Inc.
18566 2053 379 178 MegaPath Corporation
1785 2045 685 133 PaeTec Communications, Inc.
20115 1684 1654 601 Charter Communications
4323 1646 1098 420 Time Warner Telecom
701 1512 11144 783 MCI Communications Services,
30036 1373 311 576 Mediacom Communications Corp
7018 1333 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 1982 544 16 OJSC "Vimpelcom"
34984 1365 244 224 TELLCOM ILETISIM HIZMETLERI A
20940 1179 445 890 Akamai Technologies European
31148 1010 45 20 FreeNet ISP
13188 896 99 48 TOV "Bank-Inform"
6849 856 363 39 JSC UKRTELECOM,
8551 786 370 41 Bezeq International
6830 772 2327 424 UPC Distribution Services
12479 676 798 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 3423 1829 94 NET Servicos de Comunicao S.A
10620 2673 433 213 Telmex Colombia S.A.
7303 1730 1151 233 Telecom Argentina Stet-France
18881 1706 908 20 Global Village Telecom
8151 1363 2852 421 UniNet S.A. de C.V.
11830 868 364 15 Instituto Costarricense de El
27947 849 93 90 Telconet S.A
6147 795 373 27 Telefonica Del Peru
7738 780 1498 36 Telecomunicacoes da Bahia S.A
6503 775 434 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 873 338 26 LINKdotNET AS number
6713 551 633 26 Itissalat Al-MAGHRIB
8452 412 956 9 TEDATA
24835 297 144 9 RAYA Telecom - Egypt
3741 251 921 209 The Internet Solution
29571 229 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 3423 1829 94 NET Servicos de Comunicao S.A
6389 3042 3688 53 BellSouth.net Inc.
4766 2931 11557 940 Korea Telecom (KIX)
17974 2712 902 88 PT TELEKOMUNIKASI INDONESIA
10620 2673 433 213 Telmex Colombia S.A.
22773 2209 2939 137 Cox Communications, Inc.
7545 2113 319 111 TPG Internet Pty Ltd
18566 2053 379 178 MegaPath Corporation
1785 2045 685 133 PaeTec Communications, Inc.
8402 1982 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 3042 2989 BellSouth.net Inc.
17974 2712 2624 PT TELEKOMUNIKASI INDONESIA
10620 2673 2460 Telmex Colombia S.A.
22773 2209 2072 Cox Communications, Inc.
7545 2113 2002 TPG Internet Pty Ltd
4766 2931 1991 Korea Telecom (KIX)
8402 1982 1966 OJSC "Vimpelcom"
1785 2045 1912 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
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
23.91.4.0/24 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 /14:934 /15:1638 /16:12850 /17:6792 /18:11326
/19:23177 /20:33000 /21:35646 /22:50184 /23:43953 /24:250996
/25:870 /26:996 /27:461 /28:48 /29:72 /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 3042 BellSouth.net Inc.
8402 1664 1982 OJSC "Vimpelcom"
22773 1462 2209 Cox Communications, Inc.
30036 1213 1373 Mediacom Communications Corp
11492 1195 1233 Cable One
1785 1088 2045 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)
----------------------------------------------

1:919 2:871 3:3 4:17 5:808 6:21
8:611 12:1876 13:3 14:901 15:11 16:3
17:18 18:19 20:25 23:615 24:1772 27:1701
31:1517 32:45 33:2 34:5 36:95 37:1942
38:915 39:5 40:181 41:3249 42:325 44:14
46:2066 47:10 49:703 50:852 52:12 54:44
55:4 56:4 57:26 58:1151 59:581 60:367
61:1487 62:1238 63:1977 64:4393 65:2349 66:4145
67:2097 68:1097 69:3298 70:897 71:504 72:2014
74:2590 75:327 76:304 77:1217 78:1048 79:670
80:1280 81:1054 82:629 83:694 84:590 85:1256
86:382 87:1035 88:547 89:1563 90:155 91:5679
92:613 93:1611 94:2107 95:1540 96:514 97:349
98:1063 99:41 100:31 101:654 103:3758 105:530
106:143 107:217 108:537 109:2013 110:978 111:1120
112:596 113:803 114:765 115:1048 116:1001 117:828
118:1219 119:1294 120:340 121:762 122:1874 123:1270
124:1413 125:1435 128:661 129:234 130:354 131:669
132:353 133:158 134:305 135:72 136:276 137:251
138:351 139:168 140:200 141:336 142:549 143:410
144:499 145:90 146:549 147:436 148:772 149:369
150:152 151:485 152:413 153:207 154:42 155:506
156:310 157:420 158:284 159:784 160:361 161:458
162:903 163:227 164:625 165:586 166:276 167:638
168:1034 169:125 170:1106 171:185 172:11 173:1622
174:667 175:538 176:1326 177:2501 178:1876 179:308
180:1604 181:885 182:1403 183:479 184:626 185:1089
186:2650 187:1436 188:1953 189:1246 190:7244 192:7091
193:5446 194:4032 195:3362 196:1334 197:1039 198:4750
199:5504 200:6061 201:2491 202:8984 203:8885 204:4541
205:2645 206:2887 207:2808 208:3954 209:3657 210:3075
211:1598 212:2150 213:1991 214:888 215:84 216:5421
217:1711 218:634 219:323 220:1266 221:587 222:332
223:520

End of report
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