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.

Wednesday, November 13, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 14 Nov, 2013

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

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

BGP routing table entries examined: 474342
Prefixes after maximum aggregation: 189627
Deaggregation factor: 2.50
Unique aggregates announced to Internet: 234608
Total ASes present in the Internet Routing Table: 45427
Prefixes per ASN: 10.44
Origin-only ASes present in the Internet Routing Table: 35349
Origin ASes announcing only one prefix: 16279
Transit ASes present in the Internet Routing Table: 5943
Transit-only ASes present in the Internet Routing Table: 159
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: 10186
Unregistered ASNs in the Routing Table: 953
Number of 32-bit ASNs allocated by the RIRs: 5339
Number of 32-bit ASNs visible in the Routing Table: 4135
Prefixes from 32-bit ASNs in the Routing Table: 12962
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 1131
Number of addresses announced to Internet: 2655202968
Equivalent to 158 /8s, 67 /16s and 46 /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: 95.1
Total number of prefixes smaller than registry allocations: 166515

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

Prefixes being announced by APNIC Region ASes: 111801
Total APNIC prefixes after maximum aggregation: 33959
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 113985
Unique aggregates announced from the APNIC address blocks: 47681
APNIC Region origin ASes present in the Internet Routing Table: 4872
APNIC Prefixes per ASN: 23.40
APNIC Region origin ASes announcing only one prefix: 1221
APNIC Region transit ASes present in the Internet Routing Table: 835
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: 734
Number of APNIC addresses announced to Internet: 730250944
Equivalent to 43 /8s, 134 /16s and 190 /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: 162998
Total ARIN prefixes after maximum aggregation: 81724
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 163836
Unique aggregates announced from the ARIN address blocks: 76013
ARIN Region origin ASes present in the Internet Routing Table: 15922
ARIN Prefixes per ASN: 10.29
ARIN Region origin ASes announcing only one prefix: 6005
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: 34
Number of ARIN addresses announced to Internet: 1073628800
Equivalent to 63 /8s, 254 /16s and 70 /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: 121177
Total RIPE prefixes after maximum aggregation: 61190
RIPE Deaggregation factor: 1.98
Prefixes being announced from the RIPE address blocks: 124786
Unique aggregates announced from the RIPE address blocks: 79043
RIPE Region origin ASes present in the Internet Routing Table: 17515
RIPE Prefixes per ASN: 7.12
RIPE Region origin ASes announcing only one prefix: 8296
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: 31
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2469
Number of RIPE addresses announced to Internet: 656695012
Equivalent to 39 /8s, 36 /16s and 94 /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: 53035
Total LACNIC prefixes after maximum aggregation: 10017
LACNIC Deaggregation factor: 5.29
Prefixes being announced from the LACNIC address blocks: 58210
Unique aggregates announced from the LACNIC address blocks: 26940
LACNIC Region origin ASes present in the Internet Routing Table: 2038
LACNIC Prefixes per ASN: 28.56
LACNIC Region origin ASes announcing only one prefix: 551
LACNIC Region transit ASes present in the Internet Routing Table: 396
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: 892
Number of LACNIC addresses announced to Internet: 142872692
Equivalent to 8 /8s, 132 /16s and 16 /24s
Percentage of available LACNIC address space announced: 85.2

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: 11771
Total AfriNIC prefixes after maximum aggregation: 2589
AfriNIC Deaggregation factor: 4.55
Prefixes being announced from the AfriNIC address blocks: 12394
Unique aggregates announced from the AfriNIC address blocks: 4013
AfriNIC Region origin ASes present in the Internet Routing Table: 683
AfriNIC Prefixes per ASN: 18.15
AfriNIC Region origin ASes announcing only one prefix: 206
AfriNIC Region transit ASes present in the Internet Routing Table: 137
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: 48045312
Equivalent to 2 /8s, 221 /16s and 29 /24s
Percentage of available AfriNIC address space announced: 47.7

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 2935 11557 943 Korea Telecom (KIX)
17974 2712 903 89 PT TELEKOMUNIKASI INDONESIA
7545 2107 319 110 TPG Internet Pty Ltd
4755 1789 392 190 TATA Communications formerly
9829 1545 1245 45 BSNL National Internet Backbo
9583 1242 94 508 Sify Limited
9498 1213 309 74 BHARTI Airtel Ltd.
7552 1160 1080 13 Vietel Corporation
4808 1151 2124 340 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 3054 3688 56 BellSouth.net Inc.
22773 2190 2939 138 Cox Communications, Inc.
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
20115 1683 1653 608 Charter Communications
4323 1636 1097 417 Time Warner Telecom
701 1509 11147 785 MCI Communications Services,
30036 1384 312 579 Mediacom Communications Corp
7018 1333 17778 872 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 1992 544 17 OJSC "Vimpelcom"
3352 1883 2396 44 Ibernet, Internet Access Netw
34984 1363 244 223 TELLCOM ILETISIM HIZMETLERI A
20940 1133 417 856 Akamai Technologies European
31148 1006 44 19 FreeNet ISP
13188 895 99 48 TOV "Bank-Inform"
6849 861 356 30 JSC UKRTELECOM,
8551 786 370 41 Bezeq International
6830 772 2328 424 UPC Distribution Services
12479 679 798 55 Uni2 Autonomous System

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 3435 1790 86 NET Servicos de Comunicao S.A
10620 2652 430 226 >>UNKNOWN<<
7303 1728 1150 231 Telecom Argentina Stet-France
18881 1549 908 20 Global Village Telecom
8151 1363 2853 414 UniNet S.A. de C.V.
11830 866 364 15 Instituto Costarricense de El
27947 846 93 90 Telconet S.A
6147 813 373 27 Telefonica Del Peru
6503 794 434 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 887 338 26 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 417 956 9 TEDATA
24835 298 144 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 3435 1790 86 NET Servicos de Comunicao S.A
6389 3054 3688 56 BellSouth.net Inc.
4766 2935 11557 943 Korea Telecom (KIX)
17974 2712 903 89 PT TELEKOMUNIKASI INDONESIA
10620 2652 430 226 >>UNKNOWN<<
22773 2190 2939 138 Cox Communications, Inc.
7545 2107 319 110 TPG Internet Pty Ltd
18566 2057 379 178 MegaPath Corporation
1785 2039 685 130 PaeTec Communications, Inc.
8402 1992 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 3054 2998 BellSouth.net Inc.
17974 2712 2623 PT TELEKOMUNIKASI INDONESIA
10620 2652 2426 >>UNKNOWN<<
22773 2190 2052 Cox Communications, Inc.
7545 2107 1997 TPG Internet Pty Ltd
4766 2935 1992 Korea Telecom (KIX)
8402 1992 1975 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
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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
17300 UNALLOCATED 12.45.110.0/24 701 MCI Communications S

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.
23.90.192.0/18 3257 Tiscali Intl Network
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

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
/13:474 /14:922 /15:1625 /16:12829 /17:6741 /18:11316
/19:23093 /20:32856 /21:35748 /22:50215 /23:44540 /24:251070
/25:873 /26:998 /27:474 /28:50 /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 1707 3054 BellSouth.net Inc.
8402 1656 1992 OJSC "Vimpelcom"
3352 1475 1883 Ibernet, Internet Access Netw
22773 1453 2190 Cox Communications, Inc.
30036 1230 1384 Mediacom Communications Corp
11492 1190 1228 Cable One
1785 1086 2039 PaeTec Communications, Inc.
6983 1034 1293 ITC^Deltacom

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

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

1:899 2:867 3:3 4:17 5:1029 6:21
8:618 12:1899 13:3 14:898 15:11 16:3
17:17 18:19 20:21 23:562 24:1743 27:1635
31:1437 32:45 33:2 34:5 36:84 37:1917
38:920 39:5 40:182 41:3242 42:268 44:14
46:2028 47:10 49:687 50:848 52:12 54:43
55:7 56:4 57:26 58:1164 59:574 60:377
61:1468 62:1238 63:1982 64:4345 65:2347 66:4149
67:2115 68:1109 69:3306 70:873 71:489 72:2044
74:2564 75:325 76:307 77:1164 78:1065 79:675
80:1641 81:1147 82:655 83:674 84:582 85:1257
86:419 87:1005 88:613 89:1585 90:150 91:5649
92:620 93:1609 94:2034 95:1637 96:512 97:346
98:1039 99:40 100:31 101:637 103:3590 105:527
106:141 107:217 108:536 109:1946 110:975 111:1113
112:595 113:808 114:745 115:1052 116:1006 117:835
118:1179 119:1278 120:337 121:751 122:1873 123:1265
124:1401 125:1432 128:681 129:229 130:332 131:662
132:365 133:158 134:558 135:72 136:283 137:249
138:351 139:177 140:198 141:331 142:543 143:427
144:499 145:89 146:529 147:412 148:783 149:368
150:139 151:587 152:411 153:206 154:53 155:506
156:293 157:419 158:280 159:780 160:360 161:459
162:853 163:223 164:634 165:587 166:259 167:634
168:1045 169:125 170:1119 171:184 172:27 173:1587
174:687 175:521 176:1310 177:2460 178:1969 179:286
180:1595 181:865 182:1375 183:464 184:665 185:1012
186:2647 187:1454 188:1890 189:1254 190:7299 192:7049
193:5419 194:4045 195:3362 196:1337 197:1062 198:4760
199:5487 200:6089 201:2521 202:8994 203:8901 204:4534
205:2652 206:2840 207:2832 208:4024 209:3649 210:3025
211:1567 212:2172 213:1980 214:903 215:91 216:5414
217:1689 218:626 219:323 220:1277 221:578 222:327
223:507

End of report
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