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 27, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 28 Mar, 2013

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

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

BGP routing table entries examined: 445755
Prefixes after maximum aggregation: 183335
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 220333
Total ASes present in the Internet Routing Table: 43636
Prefixes per ASN: 10.22
Origin-only ASes present in the Internet Routing Table: 34342
Origin ASes announcing only one prefix: 16015
Transit ASes present in the Internet Routing Table: 5785
Transit-only ASes present in the Internet Routing Table: 143
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 32
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 383
Unregistered ASNs in the Routing Table: 136
Number of 32-bit ASNs allocated by the RIRs: 4656
Number of 32-bit ASNs visible in the Routing Table: 3509
Prefixes from 32-bit ASNs in the Routing Table: 10147
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 248
Number of addresses announced to Internet: 2621833420
Equivalent to 156 /8s, 70 /16s and 0 /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: 94.4
Total number of prefixes smaller than registry allocations: 156934

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

Prefixes being announced by APNIC Region ASes: 107533
Total APNIC prefixes after maximum aggregation: 33228
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108708
Unique aggregates announced from the APNIC address blocks: 44236
APNIC Region origin ASes present in the Internet Routing Table: 4816
APNIC Prefixes per ASN: 22.57
APNIC Region origin ASes announcing only one prefix: 1225
APNIC Region transit ASes present in the Internet Routing Table: 814
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 476
Number of APNIC addresses announced to Internet: 719951936
Equivalent to 42 /8s, 233 /16s and 152 /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: 157180
Total ARIN prefixes after maximum aggregation: 79276
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157811
Unique aggregates announced from the ARIN address blocks: 72145
ARIN Region origin ASes present in the Internet Routing Table: 15568
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5906
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: 1078432896
Equivalent to 64 /8s, 71 /16s and 148 /24s
Percentage of available ARIN address space announced: 57.1

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: 113899
Total RIPE prefixes after maximum aggregation: 58996
RIPE Deaggregation factor: 1.93
Prefixes being announced from the RIPE address blocks: 117551
Unique aggregates announced from the RIPE address blocks: 76147
RIPE Region origin ASes present in the Internet Routing Table: 17103
RIPE Prefixes per ASN: 6.87
RIPE Region origin ASes announcing only one prefix: 8151
RIPE Region transit ASes present in the Internet Routing Table: 2798
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2256
Number of RIPE addresses announced to Internet: 653711076
Equivalent to 38 /8s, 246 /16s and 214 /24s
Percentage of available RIPE address space announced: 95.0

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: 47552
Total LACNIC prefixes after maximum aggregation: 9368
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 51521
Unique aggregates announced from the LACNIC address blocks: 23854
LACNIC Region origin ASes present in the Internet Routing Table: 1878
LACNIC Prefixes per ASN: 27.43
LACNIC Region origin ASes announcing only one prefix: 554
LACNIC Region transit ASes present in the Internet Routing Table: 352
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 752
Number of LACNIC addresses announced to Internet: 125313576
Equivalent to 7 /8s, 120 /16s and 34 /24s
Percentage of available LACNIC address space announced: 74.7

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: 9308
Total AfriNIC prefixes after maximum aggregation: 2415
AfriNIC Deaggregation factor: 3.85
Prefixes being announced from the AfriNIC address blocks: 9916
Unique aggregates announced from the AfriNIC address blocks: 3735
AfriNIC Region origin ASes present in the Internet Routing Table: 588
AfriNIC Prefixes per ASN: 16.86
AfriNIC Region origin ASes announcing only one prefix: 179
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 5.1
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: 43962624
Equivalent to 2 /8s, 158 /16s and 209 /24s
Percentage of available AfriNIC address space announced: 43.7

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 2950 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1848 301 90 TPG Internet Pty Ltd
4755 1725 392 197 TATA Communications formerly
9829 1473 1189 43 BSNL National Internet Backbo
9583 1280 97 530 Sify Limited
7552 1179 1066 12 Vietel Corporation
4808 1119 2104 324 CNCGROUP IP network: China169
9498 1055 310 73 BHARTI Airtel Ltd.
24560 1055 385 169 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 3033 3694 87 bellsouth.net, inc.
7029 2178 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 1998 2929 125 Cox Communications, Inc.
1785 1967 677 124 PaeTec Communications, Inc.
20115 1683 1613 620 Charter Communications
4323 1611 1139 401 Time Warner Telecom
7018 1314 10810 851 AT&T WorldNet Services
30036 1314 289 677 Mediacom Communications Corp
11492 1214 223 327 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 1903 544 16 Corbina telecom
34984 1119 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 841 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 801 278 636 Akamai Technologies European
31148 781 41 19 FreeNet ISP
8551 717 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
58113 665 74 385 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 2449 1340 87 NET Servicos de Comunicao S.A
10620 2363 407 238 TVCABLE BOGOTA
7303 1673 1152 210 Telecom Argentina Stet-France
8151 1356 2672 402 UniNet S.A. de C.V.
6503 1186 435 68 AVANTEL, S.A.
14754 941 127 87 Telgua S. A.
18881 841 716 18 Global Village Telecom
27947 800 87 94 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 692 306 85 Empresa Nacional de Telecomun

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 1137 80 4 MOBITEL
6713 536 615 23 Itissalat Al-MAGHRIB
24863 390 274 33 LINKdotNET AS number
24835 267 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
8452 209 446 12 TEDATA
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 190 698 88 MTN Network Solutions
33776 182 12 19 Starcomms Nigeria Limited

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 3033 3694 87 bellsouth.net, inc.
4766 2950 11558 922 Korea Telecom (KIX)
17974 2508 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2449 1340 87 NET Servicos de Comunicao S.A
10620 2363 407 238 TVCABLE BOGOTA
7029 2178 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 1998 2929 125 Cox Communications, Inc.
1785 1967 677 124 PaeTec Communications, Inc.
8402 1903 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 2508 2422 PT TELEKOMUNIKASI INDONESIA
28573 2449 2362 NET Servicos de Comunicao S.A
10620 2363 2125 TVCABLE BOGOTA
4766 2950 2028 Korea Telecom (KIX)
7029 2178 1965 Windstream Communications Inc
8402 1903 1887 Corbina telecom
18566 2070 1885 Covad Communications
22773 1998 1873 Cox Communications, Inc.
1785 1967 1843 PaeTec Communications, Inc.
7545 1848 1758 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
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
26064 UNALLOCATED 12.149.37.0/24 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
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 /11:87 /12:247
/13:483 /14:875 /15:1556 /16:12643 /17:6595 /18:10863
/19:21714 /20:31722 /21:33441 /22:45832 /23:41333 /24:233987
/25:1392 /26:1770 /27:864 /28:178 /29:77 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2020 2070 Covad Communications
6389 1743 3033 bellsouth.net, inc.
8402 1597 1903 Corbina telecom
7029 1586 2178 Windstream Communications Inc
22773 1306 1998 Cox Communications, Inc.
30036 1195 1314 Mediacom Communications Corp
11492 1176 1214 Cable One
36998 1131 1137 MOBITEL
1785 1044 1967 PaeTec Communications, Inc.
7011 931 1175 Citizens Utilities

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

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

1:733 2:797 3:3 4:13 5:833 6:3
8:514 12:1921 13:3 14:764 15:11 16:3
17:8 20:19 23:247 24:1802 27:1446 31:1174
32:44 33:2 34:5 36:43 37:1702 38:857
39:2 40:159 41:2507 42:183 44:6 46:1755
47:2 49:621 50:668 52:12 54:28 55:11
57:27 58:1100 59:596 60:303 61:1449 62:977
63:2039 64:4289 65:2179 66:4283 67:2055 68:1114
69:3269 70:870 71:526 72:1898 74:2549 75:400
76:293 77:1085 78:1005 79:590 80:1248 81:977
82:602 83:574 84:556 85:1149 86:465 87:949
88:512 89:1786 90:262 91:5428 92:609 93:1608
94:1743 95:1238 96:499 97:336 98:1049 99:41
100:29 101:312 103:2308 105:486 106:134 107:207
108:515 109:1710 110:857 111:1042 112:499 113:766
114:691 115:1016 116:866 117:798 118:1001 119:1267
120:384 121:824 122:1744 123:1187 124:1323 125:1315
128:640 129:221 130:329 131:656 132:332 133:145
134:258 135:62 136:221 137:244 138:343 139:181
140:200 141:321 142:532 143:371 144:483 145:90
146:503 147:368 148:697 149:356 150:162 151:529
152:415 153:194 154:34 155:384 156:251 157:391
158:270 159:712 160:334 161:424 162:375 163:200
164:577 165:451 166:371 167:575 168:1016 169:132
170:1022 171:170 172:4 173:1574 174:584 175:435
176:1078 177:1875 178:1920 179:1 180:1371 181:303
182:1041 183:351 184:662 185:312 186:2406 187:1252
188:1887 189:1400 190:6643 192:6431 193:5679 194:4511
195:3463 196:1293 197:777 198:4283 199:5268 200:6016
201:2356 202:8863 203:8738 204:4494 205:2548 206:2787
207:2825 208:4060 209:3539 210:2922 211:1566 212:1929
213:1929 214:919 215:94 216:5189 217:1579 218:602
219:351 220:1270 221:544 222:319 223:493

End of report
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