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.

Sunday, July 1, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 02 Jul, 2012

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

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

BGP routing table entries examined: 414836
Prefixes after maximum aggregation: 175369
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 202499
Total ASes present in the Internet Routing Table: 41351
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 33279
Origin ASes announcing only one prefix: 15648
Transit ASes present in the Internet Routing Table: 5538
Transit-only ASes present in the Internet Routing Table: 135
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 27
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 389
Unregistered ASNs in the Routing Table: 126
Number of 32-bit ASNs allocated by the RIRs: 2922
Number of 32-bit ASNs visible in the Routing Table: 2534
Prefixes from 32-bit ASNs in the Routing Table: 6521
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 153
Number of addresses announced to Internet: 2571007404
Equivalent to 153 /8s, 62 /16s and 117 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.4
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 144088

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

Prefixes being announced by APNIC Region ASes: 101240
Total APNIC prefixes after maximum aggregation: 32753
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101675
Unique aggregates announced from the APNIC address blocks: 42088
APNIC Region origin ASes present in the Internet Routing Table: 4710
APNIC Prefixes per ASN: 21.59
APNIC Region origin ASes announcing only one prefix: 1238
APNIC Region transit ASes present in the Internet Routing Table: 750
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 239
Number of APNIC addresses announced to Internet: 703355520
Equivalent to 41 /8s, 236 /16s and 90 /24s
Percentage of available APNIC address space announced: 82.2

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: 151951
Total ARIN prefixes after maximum aggregation: 77143
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152899
Unique aggregates announced from the ARIN address blocks: 68280
ARIN Region origin ASes present in the Internet Routing Table: 15152
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5747
ARIN Region transit ASes present in the Internet Routing Table: 1600
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1080812160
Equivalent to 64 /8s, 107 /16s and 226 /24s
Percentage of available ARIN address space announced: 57.2

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: 103897
Total RIPE prefixes after maximum aggregation: 54953
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 106078
Unique aggregates announced from the RIPE address blocks: 67068
RIPE Region origin ASes present in the Internet Routing Table: 16631
RIPE Prefixes per ASN: 6.38
RIPE Region origin ASes announcing only one prefix: 8058
RIPE Region transit ASes present in the Internet Routing Table: 2678
Average RIPE Region AS path length visible: 4.9
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1668
Number of RIPE addresses announced to Internet: 634407428
Equivalent to 37 /8s, 208 /16s and 74 /24s
Percentage of available RIPE address space announced: 92.2

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: 41673
Total LACNIC prefixes after maximum aggregation: 8303
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 44221
Unique aggregates announced from the LACNIC address blocks: 21635
LACNIC Region origin ASes present in the Internet Routing Table: 1607
LACNIC Prefixes per ASN: 27.52
LACNIC Region origin ASes announcing only one prefix: 433
LACNIC Region transit ASes present in the Internet Routing Table: 307
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 604
Number of LACNIC addresses announced to Internet: 111626408
Equivalent to 6 /8s, 167 /16s and 72 /24s
Percentage of available LACNIC address space announced: 66.5

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: 9359
Total AfriNIC prefixes after maximum aggregation: 2163
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 9810
Unique aggregates announced from the AfriNIC address blocks: 3296
AfriNIC Region origin ASes present in the Internet Routing Table: 549
AfriNIC Prefixes per ASN: 17.87
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 124
Average AfriNIC Region AS path length visible: 4.6
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: 40516608
Equivalent to 2 /8s, 106 /16s and 60 /24s
Percentage of available AfriNIC address space announced: 40.2

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 2700 11118 1203 Korea Telecom (KIX)
17974 1964 540 77 PT TELEKOMUNIKASI INDONESIA
7545 1689 301 87 TPG Internet Pty Ltd
4755 1596 386 154 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1175 88 512 Sify Limited
4808 1109 2052 314 CNCGROUP IP network: China169
7552 1100 1062 11 Vietel Corporation
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 972 291 65 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 3395 3790 189 bellsouth.net, inc.
7029 3210 987 156 Windstream Communications Inc
18566 2090 382 180 Covad Communications
1785 1927 681 130 PaeTec Communications, Inc.
22773 1656 2911 121 Cox Communications, Inc.
20115 1651 1573 616 Charter Communications
4323 1575 1043 384 Time Warner Telecom
30036 1447 272 751 Mediacom Communications Corp
7018 1249 10027 817 AT&T WorldNet Services
11492 1190 216 354 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 1692 544 16 Corbina telecom
2118 1288 97 14 EUnet/RELCOM Autonomous Syste
12479 783 731 92 Uni2 Autonomous System
34984 716 189 175 BILISIM TELEKOM
6830 690 2234 438 UPC Distribution Services
31148 690 37 9 FreeNet ISP
20940 663 209 513 Akamai Technologies European
8551 582 364 61 Bezeq International
13188 507 100 10 Educational Network
3320 496 8443 408 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
10620 1983 345 204 TVCABLE BOGOTA
28573 1930 1213 54 NET Servicos de Comunicao S.A
6503 1523 418 65 AVANTEL, S.A.
7303 1455 933 193 Telecom Argentina Stet-France
8151 1375 3066 343 UniNet S.A. de C.V.
27947 707 74 94 Telconet S.A
11172 639 91 74 Servicios Alestra S.A de C.V
3816 590 246 90 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET S.A.
14117 558 64 62 Telefonica del Sur 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
8452 1272 958 13 TEDATA
24863 862 274 35 LINKdotNET AS number
6713 500 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 169 664 87 MTN Network Solutions
29975 167 571 19 Vodacom
15706 164 32 6 Sudatel Internet Exchange Aut

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 3395 3790 189 bellsouth.net, inc.
7029 3210 987 156 Windstream Communications Inc
4766 2700 11118 1203 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
10620 1983 345 204 TVCABLE BOGOTA
17974 1964 540 77 PT TELEKOMUNIKASI INDONESIA
28573 1930 1213 54 NET Servicos de Comunicao S.A
1785 1927 681 130 PaeTec Communications, Inc.
8402 1692 544 16 Corbina telecom
7545 1689 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 3210 3054 Windstream Communications Inc
18566 2090 1910 Covad Communications
17974 1964 1887 PT TELEKOMUNIKASI INDONESIA
28573 1930 1876 NET Servicos de Comunicao S.A
1785 1927 1797 PaeTec Communications, Inc.
10620 1983 1779 TVCABLE BOGOTA
8402 1692 1676 Corbina telecom
7545 1689 1602 TPG Internet Pty Ltd
22773 1656 1535 Cox Communications, Inc.
4766 2700 1497 Korea Telecom (KIX)

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
25639 UNALLOCATED 12.41.169.0/24 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 7018 AT&T WorldNet Servic
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
29760 UNALLOCATED 12.145.34.0/23 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
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

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
62.61.220.0/24 24974 Tachyon Europe BV - Wireless

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 /8:19 /9:13 /10:28 /11:83 /12:236
/13:464 /14:838 /15:1516 /16:12282 /17:6339 /18:10751
/19:20840 /20:29632 /21:31388 /22:40903 /23:39047 /24:216731
/25:1230 /26:1483 /27:866 /28:42 /29:64 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2617 3210 Windstream Communications Inc
18566 2040 2090 Covad Communications
6389 1870 3395 bellsouth.net, inc.
8402 1390 1692 Corbina telecom
30036 1384 1447 Mediacom Communications Corp
11492 1153 1190 Cable One
22773 1087 1656 Cox Communications, Inc.
6503 1056 1523 AVANTEL, S.A.
1785 1040 1927 PaeTec Communications, Inc.
8452 1031 1272 TEDATA

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

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

1:568 2:751 3:1 4:13 5:96 6:3
8:431 12:2003 13:1 14:632 15:12 16:3
17:5 20:24 23:184 24:1790 27:1315 31:995
32:56 33:2 34:2 36:9 37:598 38:813
39:1 40:128 41:3159 42:142 44:3 46:1460
47:2 49:404 50:565 52:13 54:12 55:7
56:1 57:34 58:989 59:500 60:251 61:1231
62:993 63:2034 64:4241 65:2248 66:4469 67:2015
68:1151 69:3191 70:979 71:502 72:1832 74:2597
75:475 76:332 77:954 78:903 79:490 80:1219
81:940 82:670 83:526 84:509 85:1193 86:434
87:933 88:344 89:1745 90:299 91:4982 92:576
93:1374 94:1560 95:1241 96:373 97:318 98:909
99:39 100:18 101:251 103:1214 106:100 107:189
108:356 109:1412 110:781 111:939 112:420 113:629
114:650 115:829 116:929 117:733 118:922 119:1233
120:351 121:695 122:1669 123:1098 124:1395 125:1256
128:534 129:188 130:263 131:615 132:291 133:22
134:245 135:61 136:215 137:233 138:336 139:175
140:492 141:261 142:420 143:372 144:534 145:76
146:510 147:287 148:766 149:318 150:156 151:173
152:478 153:175 154:17 155:433 156:219 157:381
158:191 159:621 160:341 161:269 162:352 163:192
164:630 165:413 166:583 167:476 168:911 169:126
170:884 171:145 172:5 173:1745 174:620 175:437
176:553 177:877 178:1532 180:1267 181:98 182:1023
183:244 184:533 185:1 186:1869 187:1088 188:1353
189:1605 190:5795 192:5994 193:5540 194:4548 195:3431
196:1218 197:168 198:3662 199:4792 200:5886 201:1980
202:8679 203:8629 204:4326 205:2534 206:2796 207:2790
208:4023 209:3610 210:2778 211:1555 212:2030 213:1925
214:829 215:83 216:5113 217:1566 218:554 219:318
220:1238 221:570 222:321 223:352

End of report
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