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, October 5, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 468834
Prefixes after maximum aggregation: 189064
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 232525
Total ASes present in the Internet Routing Table: 45119
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35230
Origin ASes announcing only one prefix: 16257
Transit ASes present in the Internet Routing Table: 5911
Transit-only ASes present in the Internet Routing Table: 167
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 351
Unregistered ASNs in the Routing Table: 203
Number of 32-bit ASNs allocated by the RIRs: 5150
Number of 32-bit ASNs visible in the Routing Table: 3978
Prefixes from 32-bit ASNs in the Routing Table: 12258
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 673
Number of addresses announced to Internet: 2647627284
Equivalent to 157 /8s, 207 /16s and 150 /24s
Percentage of available address space announced: 71.5
Percentage of allocated address space announced: 71.5
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 164172

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

Prefixes being announced by APNIC Region ASes: 111142
Total APNIC prefixes after maximum aggregation: 33830
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 113175
Unique aggregates announced from the APNIC address blocks: 46845
APNIC Region origin ASes present in the Internet Routing Table: 4870
APNIC Prefixes per ASN: 23.24
APNIC Region origin ASes announcing only one prefix: 1215
APNIC Region transit ASes present in the Internet Routing Table: 826
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 21
Number of APNIC region 32-bit ASNs visible in the Routing Table: 695
Number of APNIC addresses announced to Internet: 728337152
Equivalent to 43 /8s, 105 /16s and 139 /24s
Percentage of available APNIC address space announced: 85.1

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: 162842
Total ARIN prefixes after maximum aggregation: 81543
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163341
Unique aggregates announced from the ARIN address blocks: 75917
ARIN Region origin ASes present in the Internet Routing Table: 15899
ARIN Prefixes per ASN: 10.27
ARIN Region origin ASes announcing only one prefix: 6019
ARIN Region transit ASes present in the Internet Routing Table: 1661
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: 22
Number of ARIN addresses announced to Internet: 1072996096
Equivalent to 63 /8s, 244 /16s and 159 /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: 118898
Total RIPE prefixes after maximum aggregation: 61236
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 122455
Unique aggregates announced from the RIPE address blocks: 78901
RIPE Region origin ASes present in the Internet Routing Table: 17455
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8266
RIPE Region transit ASes present in the Internet Routing Table: 2817
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2407
Number of RIPE addresses announced to Internet: 656697316
Equivalent to 39 /8s, 36 /16s and 103 /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: 52012
Total LACNIC prefixes after maximum aggregation: 9843
LACNIC Deaggregation factor: 5.28
Prefixes being announced from the LACNIC address blocks: 57025
Unique aggregates announced from the LACNIC address blocks: 26292
LACNIC Region origin ASes present in the Internet Routing Table: 2030
LACNIC Prefixes per ASN: 28.09
LACNIC Region origin ASes announcing only one prefix: 564
LACNIC Region transit ASes present in the Internet Routing Table: 383
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 848
Number of LACNIC addresses announced to Internet: 140031792
Equivalent to 8 /8s, 88 /16s and 183 /24s
Percentage of available LACNIC address space announced: 83.5

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: 11528
Total AfriNIC prefixes after maximum aggregation: 2521
AfriNIC Deaggregation factor: 4.57
Prefixes being announced from the AfriNIC address blocks: 12165
Unique aggregates announced from the AfriNIC address blocks: 3990
AfriNIC Region origin ASes present in the Internet Routing Table: 654
AfriNIC Prefixes per ASN: 18.60
AfriNIC Region origin ASes announcing only one prefix: 193
AfriNIC Region transit ASes present in the Internet Routing Table: 134
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: 6
Number of AfriNIC addresses announced to Internet: 47742464
Equivalent to 2 /8s, 216 /16s and 126 /24s
Percentage of available AfriNIC address space announced: 47.4

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 2936 11561 942 Korea Telecom (KIX)
17974 2718 903 90 PT TELEKOMUNIKASI INDONESIA
7545 2084 321 112 TPG Internet Pty Ltd
4755 1769 391 187 TATA Communications formerly
9829 1551 1238 43 BSNL National Internet Backbo
9583 1237 93 507 Sify Limited
9498 1196 309 72 BHARTI Airtel Ltd.
4808 1191 2131 347 CNCGROUP IP network: China169
7552 1111 1080 13 Vietel Corporation
24560 1091 380 164 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 3060 3689 59 BellSouth.net Inc.
18566 2066 382 184 Covad Communications
22773 2055 2943 140 Cox Communications, Inc.
1785 2018 679 125 PaeTec Communications, Inc.
20115 1682 1651 619 Charter Communications
4323 1625 1104 419 Time Warner Telecom
701 1514 11148 787 UUNET Technologies, Inc.
30036 1338 301 638 Mediacom Communications Corp
7018 1333 17515 859 AT&T WorldNet Services
6983 1294 772 579 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 1837 544 17 OJSC "Vimpelcom"
34984 1365 244 222 TELLCOM ILETISIM HIZMETLERI A
20940 1039 383 805 Akamai Technologies European
31148 992 44 19 FreeNet ISP
6830 892 2365 426 UPC Distribution Services
13188 849 99 67 TOV "Bank-Inform"
8551 750 370 41 Bezeq International
12479 680 799 49 Uni2 Autonomous System
35228 528 246 16 Avatar Broadband Limited
3320 514 8418 406 Deutsche Telekom AG

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 3370 1734 88 NET Servicos de Comunicao S.A
10620 2598 423 248 TVCABLE BOGOTA
7303 1719 1133 236 Telecom Argentina Stet-France
18881 1463 844 20 Global Village Telecom
8151 1341 2807 413 UniNet S.A. de C.V.
11830 865 364 15 Instituto Costarricense de El
6503 860 434 62 AVANTEL, S.A.
27947 839 93 91 Telconet S.A
6147 799 373 27 Telefonica Del Peru
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 882 306 30 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 421 956 9 TEDATA
24835 292 80 8 RAYA Telecom - Egypt
3741 258 921 216 The Internet Solution
29571 223 17 12 Ci Telecom Autonomous system
36992 222 501 28 Etisalat MISR
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 3370 1734 88 NET Servicos de Comunicao S.A
6389 3060 3689 59 BellSouth.net Inc.
4766 2936 11561 942 Korea Telecom (KIX)
17974 2718 903 90 PT TELEKOMUNIKASI INDONESIA
10620 2598 423 248 TVCABLE BOGOTA
7545 2084 321 112 TPG Internet Pty Ltd
18566 2066 382 184 Covad Communications
22773 2055 2943 140 Cox Communications, Inc.
1785 2018 679 125 PaeTec Communications, Inc.
36998 1864 112 5 Sudanese Mobile Telephone (ZA

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 3060 3001 BellSouth.net Inc.
17974 2718 2628 PT TELEKOMUNIKASI INDONESIA
10620 2598 2350 TVCABLE BOGOTA
4766 2936 1994 Korea Telecom (KIX)
7545 2084 1972 TPG Internet Pty Ltd
22773 2055 1915 Cox Communications, Inc.
1785 2018 1893 PaeTec Communications, Inc.
18566 2066 1882 Covad Communications
36998 1864 1859 Sudanese Mobile Telephone (ZA
8402 1837 1820 OJSC "Vimpelcom"

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 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
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks

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 36086 Broad Communications Technolo
23.91.0.0/19 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.96.0/20 40676 Psychz Networks
23.91.112.0/21 32475 MidPhase Inc.
23.91.160.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c
23.91.164.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.168.0/22 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 /12:251
/13:481 /14:913 /15:1626 /16:12821 /17:6700 /18:11226
/19:22975 /20:32560 /21:35293 /22:49751 /23:43026 /24:248539
/25:894 /26:994 /27:478 /28:48 /29:78 /30:19
/31:0 /32:11

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

ASN No of nets Total ann. Description
18566 2017 2066 Covad Communications
36998 1829 1864 Sudanese Mobile Telephone (ZA
6389 1709 3060 BellSouth.net Inc.
8402 1558 1837 OJSC "Vimpelcom"
22773 1327 2055 Cox Communications, Inc.
30036 1195 1338 Mediacom Communications Corp
11492 1194 1235 Cable One
1785 1084 2018 PaeTec Communications, Inc.
6983 1034 1294 ITC^Deltacom
22561 962 1237 Digital Teleport, Inc

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

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

1:832 2:858 3:3 4:17 5:990 6:19
8:615 12:1895 13:3 14:872 15:11 16:3
17:14 18:19 20:21 23:450 24:1717 27:1593
31:1477 32:45 33:2 34:5 36:81 37:1822
38:907 39:2 40:179 41:3230 42:249 44:14
46:2026 47:6 49:677 50:840 52:12 54:39
55:3 57:26 58:1164 59:612 60:352 61:1426
62:1180 63:1975 64:4543 65:2351 66:4182 67:2078
68:1089 69:3323 70:858 71:496 72:1995 74:2558
75:326 76:306 77:1163 78:1058 79:648 80:1343
81:1021 82:653 83:586 84:594 85:1253 86:454
87:1018 88:559 89:1723 90:157 91:5640 92:611
93:1623 94:1985 95:1641 96:511 97:344 98:1034
99:43 100:31 101:608 103:3369 105:520 106:143
107:212 108:509 109:1881 110:961 111:1127 112:581
113:788 114:730 115:1020 116:984 117:833 118:1167
119:1298 120:370 121:736 122:1885 123:1218 124:1359
125:1424 128:615 129:325 130:325 131:669 132:348
133:162 134:543 135:67 136:273 137:266 138:350
139:180 140:196 141:324 142:548 143:409 144:498
145:103 146:516 147:402 148:699 149:351 150:157
151:615 152:412 153:200 154:47 155:485 156:281
157:421 158:282 159:763 160:348 161:451 162:741
163:227 164:631 165:572 166:258 167:622 168:1048
169:127 170:1069 171:200 172:25 173:1618 174:665
175:506 176:1245 177:2356 178:1922 179:150 180:1568
181:748 182:1333 183:480 184:657 185:908 186:2605
187:1488 188:1877 189:1346 190:7194 192:6990 193:5613
194:4056 195:3335 196:1310 197:988 198:4689 199:5479
200:6059 201:2527 202:8979 203:8917 204:4499 205:2619
206:2851 207:2891 208:4005 209:3622 210:2951 211:1575
212:2265 213:2008 214:899 215:96 216:5415 217:1670
218:621 219:315 220:1278 221:566 222:326 223:504


End of report
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