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, September 8, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 09 Sep, 2012

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

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

BGP routing table entries examined: 425945
Prefixes after maximum aggregation: 178214
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207414
Total ASes present in the Internet Routing Table: 42037
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33577
Origin ASes announcing only one prefix: 15746
Transit ASes present in the Internet Routing Table: 5599
Transit-only ASes present in the Internet Routing Table: 130
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 716
Unregistered ASNs in the Routing Table: 249
Number of 32-bit ASNs allocated by the RIRs: 3240
Number of 32-bit ASNs visible in the Routing Table: 2861
Prefixes from 32-bit ASNs in the Routing Table: 7517
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 190
Number of addresses announced to Internet: 2593078868
Equivalent to 154 /8s, 143 /16s and 62 /24s
Percentage of available address space announced: 70.0
Percentage of allocated address space announced: 70.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.5
Total number of prefixes smaller than registry allocations: 150120

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

Prefixes being announced by APNIC Region ASes: 102346
Total APNIC prefixes after maximum aggregation: 32967
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102957
Unique aggregates announced from the APNIC address blocks: 42627
APNIC Region origin ASes present in the Internet Routing Table: 4752
APNIC Prefixes per ASN: 21.67
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 764
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 27
Number of APNIC region 32-bit ASNs visible in the Routing Table: 296
Number of APNIC addresses announced to Internet: 707676288
Equivalent to 42 /8s, 46 /16s and 72 /24s
Percentage of available APNIC address space announced: 82.7

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: 154365
Total ARIN prefixes after maximum aggregation: 77966
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155357
Unique aggregates announced from the ARIN address blocks: 69087
ARIN Region origin ASes present in the Internet Routing Table: 15222
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5740
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 4.1
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: 1083319424
Equivalent to 64 /8s, 146 /16s and 36 /24s
Percentage of available ARIN address space announced: 57.3

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: 107985
Total RIPE prefixes after maximum aggregation: 56546
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 110389
Unique aggregates announced from the RIPE address blocks: 69855
RIPE Region origin ASes present in the Internet Routing Table: 16836
RIPE Prefixes per ASN: 6.56
RIPE Region origin ASes announcing only one prefix: 8156
RIPE Region transit ASes present in the Internet Routing Table: 2711
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: 1866
Number of RIPE addresses announced to Internet: 644470756
Equivalent to 38 /8s, 105 /16s and 215 /24s
Percentage of available RIPE address space announced: 93.7

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: 43746
Total LACNIC prefixes after maximum aggregation: 8472
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 46728
Unique aggregates announced from the LACNIC address blocks: 22220
LACNIC Region origin ASes present in the Internet Routing Table: 1643
LACNIC Prefixes per ASN: 28.44
LACNIC Region origin ASes announcing only one prefix: 437
LACNIC Region transit ASes present in the Internet Routing Table: 320
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 676
Number of LACNIC addresses announced to Internet: 115444592
Equivalent to 6 /8s, 225 /16s and 139 /24s
Percentage of available LACNIC address space announced: 68.8

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: 9849
Total AfriNIC prefixes after maximum aggregation: 2206
AfriNIC Deaggregation factor: 4.46
Prefixes being announced from the AfriNIC address blocks: 10324
Unique aggregates announced from the AfriNIC address blocks: 3473
AfriNIC Region origin ASes present in the Internet Routing Table: 560
AfriNIC Prefixes per ASN: 18.44
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 41704192
Equivalent to 2 /8s, 124 /16s and 91 /24s
Percentage of available AfriNIC address space announced: 41.4

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 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1752 301 86 TPG Internet Pty Ltd
4755 1618 387 162 TATA Communications formerly
9829 1324 1101 31 BSNL National Internet Backbo
9583 1180 87 509 Sify Limited
4808 1121 2049 319 CNCGROUP IP network: China169
7552 1121 1062 11 Vietel Corporation
24560 1038 385 159 Bharti Airtel Ltd., Telemedia
9498 1004 310 73 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
7029 3456 990 154 Windstream Communications Inc
6389 3333 3736 185 bellsouth.net, inc.
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
20115 1658 1578 614 Charter Communications
4323 1580 1026 385 Time Warner Telecom
30036 1417 279 746 Mediacom Communications Corp
7018 1252 10316 828 AT&T WorldNet Services
11492 1197 217 343 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 1643 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1221 2247 55 LDCOM NETWORKS
12479 830 765 82 Uni2 Autonomous System
34984 757 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 716 229 553 Akamai Technologies European
31148 713 37 9 FreeNet ISP
13188 702 100 9 Educational Network
58113 616 69 362 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 2140 1248 54 NET Servicos de Comunicao S.A
10620 2132 362 222 TVCABLE BOGOTA
8151 1575 3034 346 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1534 451 69 AVANTEL, S.A.
6458 792 81 15 GUATEL
27947 720 74 94 Telconet S.A
3816 636 261 101 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
14420 581 83 100 CORPORACION NACIONAL DE TELEC

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 878 275 36 LINKdotNET AS number
8452 833 958 13 TEDATA
36998 774 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
12258 194 28 66 Vodacom Internet Company
33776 194 13 11 Starcomms Nigeria Limited
15706 193 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom

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
7029 3456 990 154 Windstream Communications Inc
6389 3333 3736 185 bellsouth.net, inc.
4766 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
28573 2140 1248 54 NET Servicos de Comunicao S.A
10620 2132 362 222 TVCABLE BOGOTA
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
7545 1752 301 86 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
6389 3333 3148 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2140 2086 NET Servicos de Comunicao S.A
10620 2132 1910 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1887 1758 Cox Communications, Inc.
7545 1752 1666 TPG Internet Pty Ltd
8402 1643 1627 Corbina telecom
4766 2951 1532 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
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 12658 Dexterity Networks L
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 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.67.0/24 35567 DASTO semtel d.o.o.

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

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

Network Origin AS Description
5.226.48.0/23 44498 Pasargad Network Autonomous S
5.226.48.0/21 44498 Pasargad Network Autonomous S
5.226.50.0/23 44498 Pasargad Network Autonomous S
5.226.52.0/23 44498 Pasargad Network Autonomous S
5.226.54.0/23 44498 Pasargad Network Autonomous S
5.226.64.0/18 12741 INTERNETIA Commercial Autonom
5.226.136.0/21 25369 4u servers
5.228.0.0/16 42610 RIPE Network Coordination Cen
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg

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 /11:84 /12:237
/13:476 /14:841 /15:1542 /16:12379 /17:6411 /18:10840
/19:21054 /20:30249 /21:32136 /22:42344 /23:39882 /24:223159
/25:1405 /26:1646 /27:920 /28:173 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2812 3456 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1849 3333 bellsouth.net, inc.
8402 1366 1643 Corbina telecom
30036 1350 1417 Mediacom Communications Corp
22773 1230 1887 Cox Communications, Inc.
15557 1165 1221 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1534 AVANTEL, S.A.
1785 1013 1912 PaeTec Communications, Inc.

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

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

1:593 2:762 3:1 4:13 5:441 6:3
8:454 12:2002 13:1 14:663 15:11 16:3
17:6 20:27 23:202 24:1821 27:1333 31:898
32:56 33:2 34:2 36:7 37:760 38:828
39:2 40:133 41:3101 42:158 44:3 46:1526
47:2 49:469 50:593 52:13 54:17 55:6
56:1 57:31 58:988 59:528 60:240 61:1294
62:953 63:2002 64:4265 65:2246 66:4497 67:2051
68:1169 69:3201 70:984 71:522 72:1871 74:2574
75:496 76:322 77:951 78:936 79:490 80:1267
81:956 82:632 83:531 84:625 85:1156 86:805
87:923 88:350 89:1789 90:303 91:5196 92:577
93:1493 94:1620 95:1271 96:416 97:318 98:892
99:39 100:23 101:260 103:1493 105:512 106:118
107:197 108:444 109:1920 110:792 111:964 112:450
113:705 114:660 115:856 116:829 117:734 118:947
119:1259 120:308 121:688 122:1654 123:1170 124:1352
125:1269 128:549 129:186 130:282 131:630 132:310
133:22 134:251 135:61 136:216 137:238 138:342
139:187 140:501 141:280 142:486 143:369 144:489
145:80 146:513 147:272 148:760 149:323 150:157
151:177 152:451 153:182 154:20 155:419 156:222
157:379 158:184 159:641 160:343 161:414 162:408
163:190 164:692 165:417 166:560 167:545 168:960
169:125 170:904 171:149 172:6 173:1723 174:629
175:444 176:575 177:1104 178:1661 180:1359 181:134
182:1043 183:228 184:597 186:2191 187:1248 188:1529
189:1586 190:6095 192:6027 193:5707 194:4557 195:3446
196:1215 197:221 198:3768 199:4973 200:5990 201:1968
202:8722 203:8698 204:4422 205:2543 206:2754 207:2869
208:4057 209:3666 210:2832 211:1541 212:2029 213:1814
214:887 215:88 216:5136 217:1553 218:548 219:316
220:1239 221:531 222:339 223:378

End of report
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