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.

Thursday, September 6, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 07 Sep, 2012

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

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

BGP routing table entries examined: 424672
Prefixes after maximum aggregation: 178040
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207274
Total ASes present in the Internet Routing Table: 42003
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33565
Origin ASes announcing only one prefix: 15736
Transit ASes present in the Internet Routing Table: 5593
Transit-only ASes present in the Internet Routing Table: 139
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: 777
Unregistered ASNs in the Routing Table: 276
Number of 32-bit ASNs allocated by the RIRs: 3223
Number of 32-bit ASNs visible in the Routing Table: 2845
Prefixes from 32-bit ASNs in the Routing Table: 7477
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 174
Number of addresses announced to Internet: 2591339020
Equivalent to 154 /8s, 116 /16s and 178 /24s
Percentage of available address space announced: 69.9
Percentage of allocated address space announced: 70.0
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.4
Total number of prefixes smaller than registry allocations: 150055

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

Prefixes being announced by APNIC Region ASes: 102158
Total APNIC prefixes after maximum aggregation: 32928
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102767
Unique aggregates announced from the APNIC address blocks: 42661
APNIC Region origin ASes present in the Internet Routing Table: 4751
APNIC Prefixes per ASN: 21.63
APNIC Region origin ASes announcing only one prefix: 1244
APNIC Region transit ASes present in the Internet Routing Table: 761
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: 295
Number of APNIC addresses announced to Internet: 707727232
Equivalent to 42 /8s, 47 /16s and 15 /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: 154193
Total ARIN prefixes after maximum aggregation: 77990
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155193
Unique aggregates announced from the ARIN address blocks: 69099
ARIN Region origin ASes present in the Internet Routing Table: 15218
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5738
ARIN Region transit ASes present in the Internet Routing Table: 1597
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: 1083294592
Equivalent to 64 /8s, 145 /16s and 195 /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: 107434
Total RIPE prefixes after maximum aggregation: 56512
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109839
Unique aggregates announced from the RIPE address blocks: 69824
RIPE Region origin ASes present in the Internet Routing Table: 16831
RIPE Prefixes per ASN: 6.53
RIPE Region origin ASes announcing only one prefix: 8154
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: 1861
Number of RIPE addresses announced to Internet: 644329956
Equivalent to 38 /8s, 103 /16s and 177 /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: 43378
Total LACNIC prefixes after maximum aggregation: 8344
LACNIC Deaggregation factor: 5.20
Prefixes being announced from the LACNIC address blocks: 46332
Unique aggregates announced from the LACNIC address blocks: 22099
LACNIC Region origin ASes present in the Internet Routing Table: 1625
LACNIC Prefixes per ASN: 28.51
LACNIC Region origin ASes announcing only one prefix: 427
LACNIC Region transit ASes present in the Internet Routing Table: 315
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: 666
Number of LACNIC addresses announced to Internet: 113921320
Equivalent to 6 /8s, 202 /16s and 77 /24s
Percentage of available LACNIC address space announced: 67.9

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: 9896
Total AfriNIC prefixes after maximum aggregation: 2209
AfriNIC Deaggregation factor: 4.48
Prefixes being announced from the AfriNIC address blocks: 10367
Unique aggregates announced from the AfriNIC address blocks: 3449
AfriNIC Region origin ASes present in the Internet Routing Table: 561
AfriNIC Prefixes per ASN: 18.48
AfriNIC Region origin ASes announcing only one prefix: 173
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: 41696768
Equivalent to 2 /8s, 124 /16s and 62 /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 2950 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 1329 1104 36 BSNL National Internet Backbo
9583 1179 87 508 Sify Limited
4808 1110 2041 317 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1003 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 3458 990 154 Windstream Communications Inc
6389 3338 3736 185 bellsouth.net, inc.
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1884 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 1259 10316 831 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 1691 544 16 Corbina telecom
15557 1221 2247 55 LDCOM NETWORKS
12479 830 765 82 Uni2 Autonomous System
34984 756 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
31148 712 37 9 FreeNet ISP
20940 707 224 549 Akamai Technologies European
13188 701 100 9 Educational Network
2118 685 97 14 EUnet/RELCOM Autonomous Syste
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 362 221 TVCABLE BOGOTA
8151 1571 3032 342 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 792 81 15 GUATEL
27947 721 74 94 Telconet S.A
3816 638 262 95 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
14420 580 83 105 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 834 958 13 TEDATA
36998 776 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 267 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
33776 231 13 11 Starcomms Nigeria Limited
12258 194 28 66 Vodacom Internet Company
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 3458 990 154 Windstream Communications Inc
6389 3338 3736 185 bellsouth.net, inc.
4766 2950 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
28573 2140 1248 54 NET Servicos de Comunicao S.A
10620 2132 362 221 TVCABLE BOGOTA
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1884 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 3338 3153 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2140 2086 NET Servicos de Comunicao S.A
10620 2132 1911 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1884 1755 Cox Communications, Inc.
8402 1691 1675 Corbina telecom
7545 1752 1666 TPG Internet Pty Ltd
4766 2950 1531 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
5.206.192.0/21 39642 ESS Bredbaand A/S
5.207.0.0/16 21497 UMC Autonomous System
14.192.4.0/22 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 /11:84 /12:237
/13:475 /14:841 /15:1541 /16:12365 /17:6401 /18:10810
/19:21038 /20:30161 /21:32060 /22:42290 /23:39840 /24:222468
/25:1284 /26:1529 /27:906 /28:175 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2814 3458 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1852 3338 bellsouth.net, inc.
8402 1412 1691 Corbina telecom
30036 1350 1417 Mediacom Communications Corp
22773 1231 1884 Cox Communications, Inc.
15557 1165 1221 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1535 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)
----------------------------------------------

1:580 2:788 3:1 4:13 5:428 6:3
8:454 12:2005 13:1 14:660 15:11 16:3
17:6 20:27 23:203 24:1824 27:1334 31:1027
32:56 33:2 34:2 36:7 37:757 38:828
39:2 40:133 41:3120 42:158 44:3 46:1530
47:2 49:468 50:593 52:13 54:17 55:8
56:1 57:31 58:999 59:528 60:240 61:1289
62:1000 63:2005 64:4264 65:2241 66:4490 67:2051
68:1171 69:3194 70:983 71:523 72:1869 74:2578
75:495 76:323 77:947 78:938 79:488 80:1265
81:953 82:640 83:532 84:626 85:1156 86:808
87:924 88:351 89:1791 90:303 91:5193 92:578
93:1521 94:1631 95:1273 96:415 97:318 98:893
99:39 100:23 101:261 103:1482 105:512 106:118
107:198 108:441 109:1916 110:795 111:958 112:446
113:676 114:656 115:855 116:883 117:732 118:951
119:1258 120:307 121:690 122:1658 123:1171 124:1347
125:1270 128:555 129:185 130:282 131:631 132:302
133:22 134:251 135:61 136:217 137:238 138:342
139:187 140:502 141:279 142:485 143:360 144:491
145:80 146:515 147:272 148:759 149:313 150:157
151:176 152:451 153:182 154:20 155:419 156:222
157:380 158:184 159:641 160:343 161:414 162:407
163:190 164:694 165:413 166:562 167:544 168:960
169:125 170:900 171:149 172:6 173:1721 174:626
175:444 176:574 177:1103 178:1656 180:1353 181:134
182:1042 183:229 184:596 186:2171 187:1243 188:1528
189:1584 190:6089 192:6025 193:5509 194:4236 195:3263
196:1215 197:218 198:3779 199:4969 200:5879 201:1975
202:8698 203:8695 204:4417 205:2538 206:2752 207:2874
208:4054 209:3662 210:2832 211:1530 212:2029 213:1812
214:890 215:88 216:5136 217:1552 218:548 219:316
220:1238 221:532 222:339 223:378

End of report
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