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 20, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 21 Oct, 2012

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

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

BGP routing table entries examined: 428534
Prefixes after maximum aggregation: 179248
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 210761
Total ASes present in the Internet Routing Table: 42376
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33719
Origin ASes announcing only one prefix: 15784
Transit ASes present in the Internet Routing Table: 5648
Transit-only ASes present in the Internet Routing Table: 143
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 851
Unregistered ASNs in the Routing Table: 317
Number of 32-bit ASNs allocated by the RIRs: 3396
Number of 32-bit ASNs visible in the Routing Table: 3009
Prefixes from 32-bit ASNs in the Routing Table: 8129
Special use prefixes present in the Routing Table: 13
Prefixes being announced from unallocated address space: 164
Number of addresses announced to Internet: 2606936300
Equivalent to 155 /8s, 98 /16s and 176 /24s
Percentage of available address space announced: 70.4
Percentage of allocated address space announced: 70.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.8
Total number of prefixes smaller than registry allocations: 150143

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

Prefixes being announced by APNIC Region ASes: 103204
Total APNIC prefixes after maximum aggregation: 32546
APNIC Deaggregation factor: 3.17
Prefixes being announced from the APNIC address blocks: 103957
Unique aggregates announced from the APNIC address blocks: 42990
APNIC Region origin ASes present in the Internet Routing Table: 4768
APNIC Prefixes per ASN: 21.80
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 775
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 333
Number of APNIC addresses announced to Internet: 710964384
Equivalent to 42 /8s, 96 /16s and 116 /24s
Percentage of available APNIC address space announced: 83.1

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: 154725
Total ARIN prefixes after maximum aggregation: 78247
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155583
Unique aggregates announced from the ARIN address blocks: 69545
ARIN Region origin ASes present in the Internet Routing Table: 15274
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5770
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 4.2
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086945408
Equivalent to 64 /8s, 201 /16s and 120 /24s
Percentage of available ARIN address space announced: 57.5

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: 108933
Total RIPE prefixes after maximum aggregation: 57446
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111563
Unique aggregates announced from the RIPE address blocks: 71814
RIPE Region origin ASes present in the Internet Routing Table: 16914
RIPE Prefixes per ASN: 6.60
RIPE Region origin ASes announcing only one prefix: 8141
RIPE Region transit ASes present in the Internet Routing Table: 2747
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: 1963
Number of RIPE addresses announced to Internet: 648357668
Equivalent to 38 /8s, 165 /16s and 39 /24s
Percentage of available RIPE address space announced: 94.3

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: 43938
Total LACNIC prefixes after maximum aggregation: 8721
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 47288
Unique aggregates announced from the LACNIC address blocks: 22714
LACNIC Region origin ASes present in the Internet Routing Table: 1670
LACNIC Prefixes per ASN: 28.32
LACNIC Region origin ASes announcing only one prefix: 458
LACNIC Region transit ASes present in the Internet Routing Table: 315
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 690
Number of LACNIC addresses announced to Internet: 118099624
Equivalent to 7 /8s, 10 /16s and 14 /24s
Percentage of available LACNIC address space announced: 70.4

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: 9485
Total AfriNIC prefixes after maximum aggregation: 2234
AfriNIC Deaggregation factor: 4.25
Prefixes being announced from the AfriNIC address blocks: 9979
Unique aggregates announced from the AfriNIC address blocks: 3554
AfriNIC Region origin ASes present in the Internet Routing Table: 565
AfriNIC Prefixes per ASN: 17.66
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 6
Number of AfriNIC addresses announced to Internet: 42266368
Equivalent to 2 /8s, 132 /16s and 239 /24s
Percentage of available AfriNIC address space announced: 42.0

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 2966 11430 899 Korea Telecom (KIX)
17974 2366 830 54 PT TELEKOMUNIKASI INDONESIA
7545 1775 301 87 TPG Internet Pty Ltd
4755 1617 387 163 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1188 88 510 Sify Limited
4808 1112 2056 315 CNCGROUP IP network: China169
7552 1097 1062 15 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1019 307 69 BHARTI Airtel Ltd.

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 3185 3725 167 bellsouth.net, inc.
7029 3135 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1926 678 126 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
20115 1660 1583 615 Charter Communications
4323 1590 1155 392 Time Warner Telecom
30036 1353 269 748 Mediacom Communications Corp
7018 1273 10305 845 AT&T WorldNet Services
7011 1220 333 690 Citizens Utilities

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 1768 544 16 Corbina telecom
2118 1172 97 14 EUnet/RELCOM Autonomous Syste
12479 851 776 64 Uni2 Autonomous System
34984 814 207 189 BILISIM TELEKOM
31148 725 37 9 FreeNet ISP
6830 723 2313 445 UPC Distribution Services
20940 706 223 548 Akamai Technologies European
13188 703 93 145 Educational Network
58113 602 67 364 LIR DATACENTER TELECOM SRL
8551 574 364 61 Bezeq International

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
10620 2190 377 236 TVCABLE BOGOTA
28573 2142 1277 60 NET Servicos de Comunicao S.A
7303 1662 1131 203 Telecom Argentina Stet-France
8151 1587 3028 357 UniNet S.A. de C.V.
6503 1539 435 69 AVANTEL, S.A.
27947 737 74 95 Telconet S.A
3816 649 309 70 Empresa Nacional de Telecomun
11172 589 85 66 Servicios Alestra S.A de C.V
14420 589 87 102 CORPORACION NACIONAL DE TELEC
7738 586 1178 33 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
24863 894 275 36 LINKdotNET AS number
36998 672 48 3 MOBITEL
8452 644 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 270 80 8 RAYA Telecom - Egypt
3741 266 906 224 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 172 682 85 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 3185 3725 167 bellsouth.net, inc.
7029 3135 990 162 Windstream Communications Inc
4766 2966 11430 899 Korea Telecom (KIX)
17974 2366 830 54 PT TELEKOMUNIKASI INDONESIA
10620 2190 377 236 TVCABLE BOGOTA
28573 2142 1277 60 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1926 678 126 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
7545 1775 301 87 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
7029 3135 2973 Windstream Communications Inc
17974 2366 2312 PT TELEKOMUNIKASI INDONESIA
28573 2142 2082 NET Servicos de Comunicao S.A
4766 2966 2067 Korea Telecom (KIX)
10620 2190 1954 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1926 1800 PaeTec Communications, Inc.
22773 1907 1779 Cox Communications, Inc.
8402 1768 1752 Corbina telecom
7545 1775 1688 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
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59521 UNALLOCATED 5.134.192.0/21 29518 Labs2
59441 UNALLOCATED 5.144.128.0/21 50810 Mobin Net Communicat
59581 UNALLOCATED 5.149.8.0/21 25577 C4L main AS
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev

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

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

Network Origin AS Description
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.220.80.0/24 38925 DAC AS Germany

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 /8:18 /9:14 /10:29 /11:87 /12:242
/13:478 /14:848 /15:1548 /16:12451 /17:6507 /18:10844
/19:21206 /20:30447 /21:32457 /22:42915 /23:40154 /24:224062
/25:1350 /26:1684 /27:907 /28:178 /29:66 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2624 3135 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1791 3185 bellsouth.net, inc.
8402 1477 1768 Corbina telecom
30036 1280 1353 Mediacom Communications Corp
22773 1247 1907 Cox Communications, Inc.
11492 1148 1183 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1016 1926 PaeTec Communications, Inc.
7011 956 1220 Citizens Utilities

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

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

1:642 2:769 3:1 4:13 5:576 6:3
8:475 12:1982 13:1 14:670 15:11 16:3
17:6 20:27 23:211 24:1789 27:1369 31:1030
32:54 33:2 34:2 36:7 37:860 38:838
39:2 40:136 41:2756 42:158 44:3 46:1649
47:2 49:452 50:599 52:12 54:25 55:7
56:5 57:27 58:983 59:547 60:236 61:1295
62:940 63:2000 64:4280 65:2230 66:4529 67:2122
68:1154 69:3240 70:988 71:505 72:1871 74:2608
75:481 76:309 77:985 78:983 79:506 80:1235
81:972 82:624 83:542 84:521 85:1153 86:486
87:947 88:360 89:1805 90:304 91:5255 92:579
93:1464 94:1643 95:1127 96:396 97:325 98:970
99:39 100:32 101:270 103:1663 105:428 106:121
107:201 108:484 109:1583 110:804 111:972 112:435
113:727 114:629 115:891 116:894 117:757 118:943
119:1224 120:348 121:689 122:1698 123:1170 124:1343
125:1281 128:571 129:196 130:283 131:615 132:302
133:22 134:250 135:62 136:219 137:241 138:336
139:170 140:492 141:286 142:493 143:380 144:495
145:82 146:509 147:268 148:744 149:330 150:155
151:200 152:448 153:183 154:20 155:434 156:227
157:372 158:262 159:660 160:339 161:413 162:365
163:191 164:708 165:442 166:526 167:554 168:996
169:126 170:920 171:166 172:7 173:1658 174:617
175:452 176:767 177:1283 178:1613 180:1347 181:162
182:1104 183:314 184:607 185:28 186:2198 187:1329
188:1692 189:1576 190:5843 192:6046 193:5535 194:4583
195:3666 196:1228 197:243 198:3871 199:5099 200:6008
201:1967 202:8677 203:8714 204:4412 205:2516 206:2745
207:2803 208:4065 209:3628 210:2835 211:1535 212:2009
213:1852 214:883 215:86 216:5120 217:1571 218:572
219:315 220:1256 221:532 222:337 223:403

End of report
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