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.

Tuesday, June 5, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 06 Jun, 2012

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

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

BGP routing table entries examined: 412886
Prefixes after maximum aggregation: 174849
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 201323
Total ASes present in the Internet Routing Table: 41217
Prefixes per ASN: 10.02
Origin-only ASes present in the Internet Routing Table: 33266
Origin ASes announcing only one prefix: 15658
Transit ASes present in the Internet Routing Table: 5502
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 403
Unregistered ASNs in the Routing Table: 139
Number of 32-bit ASNs allocated by the RIRs: 2794
Number of 32-bit ASNs visible in the Routing Table: 2449
Prefixes from 32-bit ASNs in the Routing Table: 6198
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 116
Number of addresses announced to Internet: 2560922668
Equivalent to 152 /8s, 164 /16s and 148 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 171587

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

Prefixes being announced by APNIC Region ASes: 100559
Total APNIC prefixes after maximum aggregation: 32495
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 97010
Unique aggregates announced from the APNIC address blocks: 40105
APNIC Region origin ASes present in the Internet Routing Table: 4695
APNIC Prefixes per ASN: 20.66
APNIC Region origin ASes announcing only one prefix: 1243
APNIC Region transit ASes present in the Internet Routing Table: 732
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 223
Number of APNIC addresses announced to Internet: 648396096
Equivalent to 38 /8s, 165 /16s and 189 /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, 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: 151804
Total ARIN prefixes after maximum aggregation: 77132
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 122198
Unique aggregates announced from the ARIN address blocks: 51356
ARIN Region origin ASes present in the Internet Routing Table: 15150
ARIN Prefixes per ASN: 8.07
ARIN Region origin ASes announcing only one prefix: 5749
ARIN Region transit ASes present in the Internet Routing Table: 1598
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: 816644544
Equivalent to 48 /8s, 173 /16s and 1 /24s
Percentage of available ARIN address space announced: 65.1

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, 173/8,
174/8, 184/8, 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: 102896
Total RIPE prefixes after maximum aggregation: 54692
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94883
Unique aggregates announced from the RIPE address blocks: 59674
RIPE Region origin ASes present in the Internet Routing Table: 16608
RIPE Prefixes per ASN: 5.71
RIPE Region origin ASes announcing only one prefix: 8062
RIPE Region transit ASes present in the Internet Routing Table: 2653
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1620
Number of RIPE addresses announced to Internet: 515269636
Equivalent to 30 /8s, 182 /16s and 100 /24s
Percentage of available RIPE address space announced: 83.0

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,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 41809
Total LACNIC prefixes after maximum aggregation: 8295
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 42006
Unique aggregates announced from the LACNIC address blocks: 20636
LACNIC Region origin ASes present in the Internet Routing Table: 1598
LACNIC Prefixes per ASN: 26.29
LACNIC Region origin ASes announcing only one prefix: 436
LACNIC Region transit ASes present in the Internet Routing Table: 304
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 584
Number of LACNIC addresses announced to Internet: 101853064
Equivalent to 6 /8s, 18 /16s and 39 /24s
Percentage of available LACNIC address space announced: 67.5

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,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9424
Total AfriNIC prefixes after maximum aggregation: 2166
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 7473
Unique aggregates announced from the AfriNIC address blocks: 2196
AfriNIC Region origin ASes present in the Internet Routing Table: 542
AfriNIC Prefixes per ASN: 13.79
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 121
Average AfriNIC Region AS path length visible: 4.5
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31881728
Equivalent to 1 /8s, 230 /16s and 122 /24s
Percentage of available AfriNIC address space announced: 47.5

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2637 11113 1122 Korea Telecom (KIX)
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
7545 1681 301 85 TPG Internet Pty Ltd
4755 1577 385 155 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1174 87 501 Sify Limited
7552 1161 1062 11 Vietel Corporation
4808 1105 2050 317 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 63 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 3410 3807 197 bellsouth.net, inc.
7029 3341 986 159 Windstream Communications Inc
18566 2092 382 181 Covad Communications
1785 1912 680 130 PaeTec Communications, Inc.
20115 1646 1569 615 Charter Communications
22773 1638 2911 121 Cox Communications, Inc.
4323 1574 1043 385 Time Warner Telecom
30036 1423 265 753 Mediacom Communications Corp
7018 1224 10031 824 AT&T WorldNet Services
11492 1188 216 358 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 1764 544 16 Corbina telecom
2118 1226 97 14 EUnet/RELCOM Autonomous Syste
34984 704 188 171 BILISIM TELEKOM
12479 690 682 72 Uni2 Autonomous System
31148 684 37 9 FreeNet ISP
20940 667 219 520 Akamai Technologies European
6830 654 2215 425 UPC Distribution Services
8551 579 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark

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 1926 341 204 TVCABLE BOGOTA
28573 1926 1184 48 NET Servicos de Comunicao S.A
6503 1532 418 64 AVANTEL, S.A.
8151 1485 3068 335 UniNet S.A. de C.V.
7303 1436 901 192 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 692 73 94 Telconet S.A
11172 644 91 73 Servicios Alestra S.A de C.V
3816 585 247 89 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET 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 1415 958 13 TEDATA
24863 852 274 35 LINKdotNET AS number
6713 497 649 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 171 666 85 MTN Network Solutions
15706 169 32 6 Sudatel Internet Exchange Aut
29571 157 15 16 Ci Telecom Autonomous system

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 3410 3807 197 bellsouth.net, inc.
7029 3341 986 159 Windstream Communications Inc
4766 2637 11113 1122 Korea Telecom (KIX)
18566 2092 382 181 Covad Communications
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
10620 1926 341 204 TVCABLE BOGOTA
28573 1926 1184 48 NET Servicos de Comunicao S.A
1785 1912 680 130 PaeTec Communications, Inc.
8402 1764 544 16 Corbina telecom
7545 1681 301 85 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 3341 3182 Windstream Communications Inc
18566 2092 1911 Covad Communications
28573 1926 1878 NET Servicos de Comunicao S.A
17974 1928 1847 PT TELEKOMUNIKASI INDONESIA
1785 1912 1782 PaeTec Communications, Inc.
8402 1764 1748 Corbina telecom
10620 1926 1722 TVCABLE BOGOTA
7545 1681 1596 TPG Internet Pty Ltd
22773 1638 1517 Cox Communications, Inc.
4766 2637 1515 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
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
14764 UNALLOCATED 12.108.237.0/24 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
128.0.0.0/21 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
5.57.192.0/21 12360 Kevag Telekom GmbH - AS RZ On
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

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 /11:82 /12:236
/13:461 /14:833 /15:1501 /16:12302 /17:6313 /18:10639
/19:20800 /20:29486 /21:30978 /22:40812 /23:38532 /24:216072
/25:1232 /26:1451 /27:825 /28:169 /29:66 /30:16
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3000 3341 Windstream Communications Inc
6389 2129 3410 bellsouth.net, inc.
18566 2041 2092 Covad Communications
8402 1742 1764 Corbina telecom
30036 1363 1423 Mediacom Communications Corp
6503 1223 1532 AVANTEL, S.A.
8452 1216 1415 TEDATA
11492 1151 1188 Cable One
22773 1083 1638 Cox Communications, Inc.
1785 1068 1912 PaeTec Communications, Inc.

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

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

1:556 2:758 3:1 4:13 5:41 6:3
8:424 12:2013 13:1 14:615 15:12 16:3
17:5 20:23 23:176 24:1774 27:1280 31:988
32:56 33:2 34:2 36:9 37:651 38:811
40:124 41:3283 42:135 44:3 46:1432 47:3
49:430 50:554 52:13 54:12 55:13 56:3
57:33 58:961 59:498 60:259 61:1210 62:1012
63:2009 64:4255 65:2249 66:4467 67:2031 68:1157
69:3186 70:953 71:508 72:1822 74:2603 75:494
76:327 77:953 78:983 79:488 80:1229 81:939
82:662 83:544 84:492 85:1192 86:435 87:906
88:345 89:1729 90:284 91:4898 92:557 93:1399
94:1577 95:1184 96:364 97:314 98:900 99:38
100:7 101:259 103:1128 106:95 107:186 108:316
109:1366 110:770 111:916 112:417 113:615 114:621
115:843 116:951 117:722 118:921 119:1234 120:358
121:698 122:1666 123:1099 124:1387 125:1261 128:552
129:198 130:248 131:630 132:289 133:22 134:244
135:61 136:215 137:240 138:358 139:186 140:493
141:252 142:415 143:416 144:544 145:72 146:511
147:288 148:774 149:308 150:164 151:177 152:469
153:172 154:14 155:441 156:221 157:381 158:185
159:575 160:344 161:263 162:347 163:191 164:614
165:383 166:593 167:470 168:864 169:126 170:877
171:136 172:2 173:1762 174:613 175:432 176:545
177:818 178:1397 180:1231 181:88 182:1044 183:227
184:525 185:1 186:2317 187:1115 188:1318 189:1825
190:5534 192:6000 193:5511 194:4529 195:3390 196:1216
197:147 198:3667 199:4739 200:5870 201:1920 202:8601
203:8554 204:4341 205:2532 206:2775 207:2797 208:4055
209:3612 210:2757 211:1546 212:2041 213:1931 214:874
215:98 216:5086 217:1554 218:552 219:313 220:1239
221:571 222:315 223:318

End of report
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