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, March 13, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 445702
Prefixes after maximum aggregation: 183296
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 218833
Total ASes present in the Internet Routing Table: 43572
Prefixes per ASN: 10.23
Origin-only ASes present in the Internet Routing Table: 34321
Origin ASes announcing only one prefix: 16012
Transit ASes present in the Internet Routing Table: 5784
Transit-only ASes present in the Internet Routing Table: 133
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 365
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 4607
Number of 32-bit ASNs visible in the Routing Table: 3467
Prefixes from 32-bit ASNs in the Routing Table: 9720
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 191
Number of addresses announced to Internet: 2622837836
Equivalent to 156 /8s, 85 /16s and 84 /24s
Percentage of available address space announced: 70.8
Percentage of allocated address space announced: 70.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.3
Total number of prefixes smaller than registry allocations: 157411

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

Prefixes being announced by APNIC Region ASes: 107093
Total APNIC prefixes after maximum aggregation: 33201
APNIC Deaggregation factor: 3.23
Prefixes being announced from the APNIC address blocks: 108227
Unique aggregates announced from the APNIC address blocks: 44071
APNIC Region origin ASes present in the Internet Routing Table: 4820
APNIC Prefixes per ASN: 22.45
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 812
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 456
Number of APNIC addresses announced to Internet: 719175488
Equivalent to 42 /8s, 221 /16s and 191 /24s
Percentage of available APNIC address space announced: 84.1

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 156865
Total ARIN prefixes after maximum aggregation: 79242
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157543
Unique aggregates announced from the ARIN address blocks: 71587
ARIN Region origin ASes present in the Internet Routing Table: 15547
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5888
ARIN Region transit ASes present in the Internet Routing Table: 1608
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 1078294656
Equivalent to 64 /8s, 69 /16s and 120 /24s
Percentage of available ARIN address space announced: 57.0

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, 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: 114157
Total RIPE prefixes after maximum aggregation: 59059
RIPE Deaggregation factor: 1.93
Prefixes being announced from the RIPE address blocks: 117519
Unique aggregates announced from the RIPE address blocks: 75427
RIPE Region origin ASes present in the Internet Routing Table: 17109
RIPE Prefixes per ASN: 6.87
RIPE Region origin ASes announcing only one prefix: 8157
RIPE Region transit ASes present in the Internet Routing Table: 2805
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2237
Number of RIPE addresses announced to Internet: 654689124
Equivalent to 39 /8s, 5 /16s and 195 /24s
Percentage of available RIPE address space announced: 95.2

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, 196608-199679
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: 47230
Total LACNIC prefixes after maximum aggregation: 9315
LACNIC Deaggregation factor: 5.07
Prefixes being announced from the LACNIC address blocks: 51108
Unique aggregates announced from the LACNIC address blocks: 23776
LACNIC Region origin ASes present in the Internet Routing Table: 1857
LACNIC Prefixes per ASN: 27.52
LACNIC Region origin ASes announcing only one prefix: 544
LACNIC Region transit ASes present in the Internet Routing Table: 345
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 30
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 749
Number of LACNIC addresses announced to Internet: 124708904
Equivalent to 7 /8s, 110 /16s and 232 /24s
Percentage of available LACNIC address space announced: 74.3

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 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: 10509
Total AfriNIC prefixes after maximum aggregation: 2429
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 11114
Unique aggregates announced from the AfriNIC address blocks: 3798
AfriNIC Region origin ASes present in the Internet Routing Table: 610
AfriNIC Prefixes per ASN: 18.22
AfriNIC Region origin ASes announcing only one prefix: 181
AfriNIC Region transit ASes present in the Internet Routing Table: 130
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 45611264
Equivalent to 2 /8s, 183 /16s and 249 /24s
Percentage of available AfriNIC address space announced: 45.3

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 2925 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1833 301 89 TPG Internet Pty Ltd
4755 1701 390 190 TATA Communications formerly
9829 1449 1158 43 BSNL National Internet Backbo
9583 1287 98 535 Sify Limited
7552 1162 1070 12 Vietel Corporation
4808 1116 2054 321 CNCGROUP IP network: China169
9498 1067 310 75 BHARTI Airtel Ltd.
24560 1058 385 161 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 3047 3695 94 bellsouth.net, inc.
7029 2232 1266 215 Windstream Communications Inc
18566 2080 382 185 Covad Communications
22773 1991 2929 124 Cox Communications, Inc.
1785 1959 677 123 PaeTec Communications, Inc.
20115 1681 1611 623 Charter Communications
4323 1614 1139 402 Time Warner Telecom
30036 1331 292 689 Mediacom Communications Corp
7018 1306 10809 852 AT&T WorldNet Services
11492 1210 222 329 Cable One

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 1902 544 16 Corbina telecom
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
34984 1091 232 205 BILISIM TELEKOM
13188 839 99 30 Educational Network
12479 837 784 69 Uni2 Autonomous System
20940 780 270 617 Akamai Technologies European
31148 776 40 19 FreeNet ISP
6830 714 2314 435 UPC Distribution Services
8551 713 370 43 Bezeq International
58113 662 73 384 LIR DATACENTER TELECOM SRL

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 2423 1332 86 NET Servicos de Comunicao S.A
10620 2348 404 232 TVCABLE BOGOTA
7303 1681 1147 207 Telecom Argentina Stet-France
8151 1350 2723 398 UniNet S.A. de C.V.
6503 1259 435 68 AVANTEL, S.A.
14754 944 128 86 Telgua S. A.
18881 820 716 18 Global Village Telecom
27947 790 87 99 Telconet S.A
3816 689 306 85 Empresa Nacional de Telecomun
7738 650 1306 35 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 1286 80 4 MOBITEL
24863 894 274 34 LINKdotNET AS number
6713 535 615 23 Itissalat Al-MAGHRIB
8452 467 958 13 TEDATA
24835 342 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 190 698 88 MTN Network Solutions

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
6389 3047 3695 94 bellsouth.net, inc.
4766 2925 11558 922 Korea Telecom (KIX)
17974 2504 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2423 1332 86 NET Servicos de Comunicao S.A
10620 2348 404 232 TVCABLE BOGOTA
7029 2232 1266 215 Windstream Communications Inc
18566 2080 382 185 Covad Communications
22773 1991 2929 124 Cox Communications, Inc.
1785 1959 677 123 PaeTec Communications, Inc.
8402 1902 544 16 Corbina telecom

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
17974 2504 2418 PT TELEKOMUNIKASI INDONESIA
28573 2423 2337 NET Servicos de Comunicao S.A
10620 2348 2116 TVCABLE BOGOTA
7029 2232 2017 Windstream Communications Inc
4766 2925 2003 Korea Telecom (KIX)
18566 2080 1895 Covad Communications
8402 1902 1886 Corbina telecom
22773 1991 1867 Cox Communications, Inc.
1785 1959 1836 PaeTec Communications, Inc.
7545 1833 1744 TPG Internet Pty Ltd

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

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

Bad AS Designation Network Transit AS Description
65119 PRIVATE 8.36.67.0/24 6352 E*Trade Group
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 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
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
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.96.0/21 12886 LEWTelNet GmbH
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 mywire Datentechnik GmbH

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
41.222.80.0/21 37110 Moztel LDA
62.12.96.0/19 38478 SunnyVision Limited
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.

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 /8:17 /9:13 /10:29 /11:88 /12:248
/13:483 /14:871 /15:1563 /16:12650 /17:6636 /18:10882
/19:21707 /20:31610 /21:33519 /22:45973 /23:41549 /24:233579
/25:1367 /26:1769 /27:859 /28:180 /29:73 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
18566 2030 2080 Covad Communications
6389 1750 3047 bellsouth.net, inc.
8402 1626 1902 Corbina telecom
7029 1611 2232 Windstream Communications Inc
22773 1304 1991 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1214 1331 Mediacom Communications Corp
11492 1172 1210 Cable One
1785 1039 1959 PaeTec Communications, Inc.
7011 948 1195 Citizens Utilities

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

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

1:724 2:793 3:3 4:13 5:701 6:3
8:507 12:1931 13:3 14:754 15:11 16:3
17:8 20:24 23:240 24:1797 27:1449 31:1175
32:44 33:2 34:5 36:21 37:1412 38:858
39:2 40:159 41:2662 42:177 44:4 46:1743
47:1 49:601 50:663 52:12 54:28 55:7
57:28 58:1091 59:568 60:296 61:1366 62:1000
63:2043 64:4300 65:2177 66:4268 67:2058 68:1108
69:3273 70:882 71:521 72:1897 74:2549 75:401
76:288 77:1089 78:1021 79:575 80:1235 81:977
82:611 83:557 84:560 85:1160 86:473 87:946
88:376 89:1762 90:262 91:5426 92:602 93:1721
94:1859 95:1609 96:497 97:336 98:1049 99:41
100:29 101:309 103:2281 105:517 106:131 107:207
108:515 109:1811 110:859 111:1037 112:497 113:755
114:689 115:927 116:883 117:807 118:992 119:1270
120:377 121:711 122:1737 123:1192 124:1323 125:1311
128:543 129:221 130:321 131:642 132:335 133:144
134:256 135:62 136:222 137:241 138:343 139:179
140:197 141:311 142:533 143:385 144:484 145:89
146:521 147:358 148:705 149:357 150:157 151:437
152:411 153:196 154:32 155:378 156:249 157:392
158:266 159:715 160:336 161:425 162:377 163:205
164:579 165:454 166:395 167:573 168:1014 169:130
170:1021 171:167 172:4 173:1585 174:583 175:426
176:1178 177:1778 178:1757 179:1 180:1380 181:275
182:1201 183:343 184:660 185:293 186:2327 187:1289
188:1914 189:1443 190:6633 192:6405 193:5676 194:4520
195:3472 196:1304 197:886 198:4203 199:5244 200:6038
201:2237 202:8907 203:8719 204:4487 205:2580 206:2785
207:2798 208:4071 209:3548 210:2914 211:1559 212:1992
213:1936 214:909 215:97 216:5188 217:1573 218:602
219:337 220:1263 221:538 222:316 223:482

End of report
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