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, November 16, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 17 Nov, 2013

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

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

BGP routing table entries examined: 472411
Prefixes after maximum aggregation: 189255
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234532
Total ASes present in the Internet Routing Table: 45451
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35334
Origin ASes announcing only one prefix: 16288
Transit ASes present in the Internet Routing Table: 5961
Transit-only ASes present in the Internet Routing Table: 164
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: 1007
Unregistered ASNs in the Routing Table: 304
Number of 32-bit ASNs allocated by the RIRs: 5359
Number of 32-bit ASNs visible in the Routing Table: 4156
Prefixes from 32-bit ASNs in the Routing Table: 13037
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1088
Number of addresses announced to Internet: 2654901656
Equivalent to 158 /8s, 62 /16s and 149 /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: 164925

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

Prefixes being announced by APNIC Region ASes: 111715
Total APNIC prefixes after maximum aggregation: 33898
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 113938
Unique aggregates announced from the APNIC address blocks: 47672
APNIC Region origin ASes present in the Internet Routing Table: 4868
APNIC Prefixes per ASN: 23.41
APNIC Region origin ASes announcing only one prefix: 1220
APNIC Region transit ASes present in the Internet Routing Table: 834
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: 742
Number of APNIC addresses announced to Internet: 729754304
Equivalent to 43 /8s, 127 /16s and 42 /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: 162996
Total ARIN prefixes after maximum aggregation: 81601
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163777
Unique aggregates announced from the ARIN address blocks: 76021
ARIN Region origin ASes present in the Internet Routing Table: 15912
ARIN Prefixes per ASN: 10.29
ARIN Region origin ASes announcing only one prefix: 6003
ARIN Region transit ASes present in the Internet Routing Table: 1658
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: 36
Number of ARIN addresses announced to Internet: 1073396352
Equivalent to 63 /8s, 250 /16s and 186 /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: 119194
Total RIPE prefixes after maximum aggregation: 60997
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 122918
Unique aggregates announced from the RIPE address blocks: 78875
RIPE Region origin ASes present in the Internet Routing Table: 17522
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8307
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: 2482
Number of RIPE addresses announced to Internet: 656719844
Equivalent to 39 /8s, 36 /16s and 191 /24s
Percentage of available RIPE address space announced: 95.5

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: 53121
Total LACNIC prefixes after maximum aggregation: 10008
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 58333
Unique aggregates announced from the LACNIC address blocks: 27051
LACNIC Region origin ASes present in the Internet Routing Table: 2040
LACNIC Prefixes per ASN: 28.59
LACNIC Region origin ASes announcing only one prefix: 554
LACNIC Region transit ASes present in the Internet Routing Table: 399
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 35
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 890
Number of LACNIC addresses announced to Internet: 143162228
Equivalent to 8 /8s, 136 /16s and 123 /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: 11733
Total AfriNIC prefixes after maximum aggregation: 2594
AfriNIC Deaggregation factor: 4.52
Prefixes being announced from the AfriNIC address blocks: 12357
Unique aggregates announced from the AfriNIC address blocks: 4038
AfriNIC Region origin ASes present in the Internet Routing Table: 681
AfriNIC Prefixes per ASN: 18.15
AfriNIC Region origin ASes announcing only one prefix: 204
AfriNIC Region transit ASes present in the Internet Routing Table: 138
Average AfriNIC Region AS path length visible: 4.6
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: 48068864
Equivalent to 2 /8s, 221 /16s and 121 /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 2108 319 110 TPG Internet Pty Ltd
4755 1789 392 190 TATA Communications formerly
9829 1542 1245 45 BSNL National Internet Backbo
9583 1242 94 508 Sify Limited
9498 1216 309 74 BHARTI Airtel Ltd.
7552 1165 1080 13 Vietel Corporation
4808 1146 2124 339 CNCGROUP IP network: China169
24560 1096 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 2199 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 1637 1098 417 Time Warner Telecom
701 1507 11146 783 MCI Communications Services,
30036 1382 311 583 Mediacom Communications Corp
7018 1331 17778 869 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 1939 544 17 OJSC "Vimpelcom"
34984 1363 244 223 TELLCOM ILETISIM HIZMETLERI A
20940 1137 421 860 Akamai Technologies European
31148 1005 45 19 FreeNet ISP
13188 895 99 48 TOV "Bank-Inform"
6849 861 356 30 JSC UKRTELECOM,
8551 787 370 41 Bezeq International
6830 774 2328 426 UPC Distribution Services
12479 680 798 55 Uni2 Autonomous System
35228 547 246 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 3413 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 1621 908 20 Global Village Telecom
8151 1362 2853 414 UniNet S.A. de C.V.
11830 866 364 15 Instituto Costarricense de El
27947 821 94 92 Telconet S.A
6147 813 373 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 1840 112 5 Sudanese Mobile Telephone (ZA
24863 887 338 26 LINKdotNET AS number
6713 552 633 26 Itissalat Al-MAGHRIB
8452 419 956 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 3413 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 2199 2939 138 Cox Communications, Inc.
7545 2108 319 110 TPG Internet Pty Ltd
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
8402 1939 544 17 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 2199 2061 Cox Communications, Inc.
7545 2108 1998 TPG Internet Pty Ltd
4766 2930 1987 Korea Telecom (KIX)
8402 1939 1922 OJSC "Vimpelcom"
1785 2039 1909 PaeTec Communications, Inc.
18566 2057 1879 MegaPath Corporation
36998 1840 1835 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
23.91.4.0/24 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.
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c
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 /12:254
/13:474 /14:921 /15:1628 /16:12826 /17:6758 /18:11330
/19:23097 /20:32876 /21:35577 /22:49905 /23:43809 /24:250354
/25:862 /26:989 /27:462 /28:42 /29:67 /30:16
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2011 2057 MegaPath Corporation
36998 1805 1840 Sudanese Mobile Telephone (ZA
6389 1704 3049 BellSouth.net Inc.
8402 1604 1939 OJSC "Vimpelcom"
22773 1458 2199 Cox Communications, Inc.
30036 1228 1382 Mediacom Communications Corp
11492 1193 1231 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 2:835 3:3 4:17 5:1024 6:21
8:620 12:1881 13:3 14:897 15:9 16:3
17:15 18:19 20:21 23:562 24:1746 27:1627
31:1443 32:44 33:2 34:5 36:86 37:1925
38:919 39:5 40:182 41:3225 42:274 44:14
46:2032 47:10 49:689 50:848 52:12 54:43
55:7 56:4 57:26 58:1164 59:573 60:380
61:1467 62:1238 63:1975 64:4331 65:2342 66:4147
67:2115 68:1108 69:3291 70:874 71:490 72:2044
74:2570 75:325 76:307 77:1159 78:1063 79:674
80:1301 81:1039 82:644 83:660 84:591 85:1256
86:383 87:1026 88:559 89:1550 90:150 91:5668
92:602 93:1609 94:2068 95:1611 96:512 97:350
98:1038 99:41 100:32 101:649 103:3602 105:527
106:140 107:217 108:536 109:1972 110:964 111:1115
112:595 113:810 114:744 115:1052 116:1006 117:823
118:1183 119:1272 120:329 121:751 122:1867 123:1263
124:1403 125:1432 128:677 129:229 130:350 131:662
132:356 133:158 134:558 135:72 136:277 137:250
138:348 139:177 140:198 141:331 142:545 143:399
144:493 145:90 146:527 147:408 148:779 149:368
150:138 151:653 152:411 153:205 154:52 155:495
156:294 157:418 158:280 159:779 160:361 161:457
162:856 163:223 164:634 165:587 166:260 167:635
168:1044 169:125 170:1118 171:185 172:27 173:1586
174:689 175:527 176:1327 177:2463 178:1955 179:296
180:1576 181:873 182:1378 183:466 184:658 185:1027
186:2632 187:1458 188:1880 189:1266 190:7315 192:7054
193:5425 194:4040 195:3360 196:1339 197:1038 198:4755
199:5486 200:6068 201:2521 202:8967 203:8882 204:4533
205:2644 206:2836 207:2834 208:4007 209:3656 210:3034
211:1568 212:2150 213:1976 214:895 215:91 216:5424
217:1694 218:627 219:323 220:1277 221:579 222:326
223:507

End of report
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