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 13, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 14 Sep, 2012

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

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

BGP routing table entries examined: 426695
Prefixes after maximum aggregation: 177824
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 207308
Total ASes present in the Internet Routing Table: 42092
Prefixes per ASN: 10.14
Origin-only ASes present in the Internet Routing Table: 33596
Origin ASes announcing only one prefix: 15752
Transit ASes present in the Internet Routing Table: 5617
Transit-only ASes present in the Internet Routing Table: 138
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: 713
Unregistered ASNs in the Routing Table: 252
Number of 32-bit ASNs allocated by the RIRs: 3270
Number of 32-bit ASNs visible in the Routing Table: 2879
Prefixes from 32-bit ASNs in the Routing Table: 7671
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 171
Number of addresses announced to Internet: 2595684300
Equivalent to 154 /8s, 182 /16s and 255 /24s
Percentage of available address space announced: 70.1
Percentage of allocated address space announced: 70.1
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.6
Total number of prefixes smaller than registry allocations: 150422

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

Prefixes being announced by APNIC Region ASes: 102559
Total APNIC prefixes after maximum aggregation: 32492
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103168
Unique aggregates announced from the APNIC address blocks: 42710
APNIC Region origin ASes present in the Internet Routing Table: 4761
APNIC Prefixes per ASN: 21.67
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 771
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: 303
Number of APNIC addresses announced to Internet: 708023616
Equivalent to 42 /8s, 51 /16s and 149 /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: 154150
Total ARIN prefixes after maximum aggregation: 78018
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155139
Unique aggregates announced from the ARIN address blocks: 69136
ARIN Region origin ASes present in the Internet Routing Table: 15231
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5738
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: 1084094336
Equivalent to 64 /8s, 157 /16s and 247 /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: 108416
Total RIPE prefixes after maximum aggregation: 56602
RIPE Deaggregation factor: 1.92
Prefixes being announced from the RIPE address blocks: 110891
Unique aggregates announced from the RIPE address blocks: 69948
RIPE Region origin ASes present in the Internet Routing Table: 16844
RIPE Prefixes per ASN: 6.58
RIPE Region origin ASes announcing only one prefix: 8158
RIPE Region transit ASes present in the Internet Routing Table: 2715
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: 1873
Number of RIPE addresses announced to Internet: 645247204
Equivalent to 38 /8s, 117 /16s and 176 /24s
Percentage of available RIPE address space announced: 93.8

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: 43892
Total LACNIC prefixes after maximum aggregation: 8430
LACNIC Deaggregation factor: 5.21
Prefixes being announced from the LACNIC address blocks: 46961
Unique aggregates announced from the LACNIC address blocks: 21906
LACNIC Region origin ASes present in the Internet Routing Table: 1642
LACNIC Prefixes per ASN: 28.60
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 321
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: 680
Number of LACNIC addresses announced to Internet: 116150056
Equivalent to 6 /8s, 236 /16s and 79 /24s
Percentage of available LACNIC address space announced: 69.2

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: 9885
Total AfriNIC prefixes after maximum aggregation: 2225
AfriNIC Deaggregation factor: 4.44
Prefixes being announced from the AfriNIC address blocks: 10365
Unique aggregates announced from the AfriNIC address blocks: 3466
AfriNIC Region origin ASes present in the Internet Routing Table: 564
AfriNIC Prefixes per ASN: 18.38
AfriNIC Region origin ASes announcing only one prefix: 175
AfriNIC Region transit ASes present in the Internet Routing Table: 128
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: 41808896
Equivalent to 2 /8s, 125 /16s and 244 /24s
Percentage of available AfriNIC address space announced: 41.5

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 2975 11429 901 Korea Telecom (KIX)
17974 2340 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1757 301 86 TPG Internet Pty Ltd
4755 1617 387 162 TATA Communications formerly
9829 1334 1106 41 BSNL National Internet Backbo
9583 1182 87 511 Sify Limited
7552 1128 1062 11 Vietel Corporation
4808 1127 2050 320 CNCGROUP IP network: China169
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1009 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
6389 3329 3735 185 bellsouth.net, inc.
7029 3152 990 161 Windstream Communications Inc
18566 2085 382 180 Covad Communications
1785 1911 678 128 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
20115 1659 1580 615 Charter Communications
4323 1579 1154 387 Time Warner Telecom
30036 1394 274 746 Mediacom Communications Corp
7018 1239 10316 826 AT&T WorldNet Services
7011 1204 329 698 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 1685 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1224 2247 55 LDCOM NETWORKS
12479 842 773 78 Uni2 Autonomous System
34984 765 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 719 230 555 Akamai Technologies European
31148 714 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
10620 2146 366 220 TVCABLE BOGOTA
28573 2135 1248 54 NET Servicos de Comunicao S.A
8151 1578 3034 347 UniNet S.A. de C.V.
7303 1565 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 751 81 15 GUATEL
27947 721 74 94 Telconet S.A
3816 643 310 30 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 879 275 36 LINKdotNET AS number
8452 810 958 13 TEDATA
36998 772 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 263 904 223 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
6389 3329 3735 185 bellsouth.net, inc.
7029 3152 990 161 Windstream Communications Inc
4766 2975 11429 901 Korea Telecom (KIX)
17974 2340 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2146 366 220 TVCABLE BOGOTA
28573 2135 1248 54 NET Servicos de Comunicao S.A
18566 2085 382 180 Covad Communications
1785 1911 678 128 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
7545 1757 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
7029 3152 2991 Windstream Communications Inc
17974 2340 2286 PT TELEKOMUNIKASI INDONESIA
28573 2135 2081 NET Servicos de Comunicao S.A
4766 2975 2074 Korea Telecom (KIX)
10620 2146 1926 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1911 1783 PaeTec Communications, Inc.
22773 1887 1758 Cox Communications, Inc.
7545 1757 1671 TPG Internet Pty Ltd
8402 1685 1669 Corbina telecom

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 5.149.64.0/19 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.

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

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

Network Origin AS Description
5.248.0.0/16 15895 Kyivstar GSM
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 /8:18 /9:14 /10:29 /11:84 /12:237
/13:477 /14:845 /15:1545 /16:12390 /17:6432 /18:10849
/19:21093 /20:30251 /21:32177 /22:42376 /23:39910 /24:223697
/25:1402 /26:1667 /27:921 /28:176 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2639 3152 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1851 3329 bellsouth.net, inc.
8402 1408 1685 Corbina telecom
30036 1329 1394 Mediacom Communications Corp
22773 1228 1887 Cox Communications, Inc.
15557 1168 1224 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1053 1535 AVANTEL, S.A.
1785 1013 1911 PaeTec Communications, Inc.

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

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

1:606 2:617 3:1 4:13 5:470 6:3
8:456 12:2001 13:1 14:665 15:11 16:3
17:6 20:27 23:202 24:1787 27:1330 31:1020
32:56 33:2 34:2 36:7 37:757 38:827
39:2 40:133 41:3117 42:158 44:3 46:1572
47:2 49:477 50:595 52:13 54:18 55:8
56:1 57:31 58:989 59:531 60:241 61:1292
62:952 63:1994 64:4269 65:2240 66:4499 67:2040
68:1170 69:3202 70:983 71:509 72:1873 74:2599
75:483 76:314 77:946 78:965 79:487 80:1266
81:957 82:628 83:532 84:615 85:1157 86:811
87:925 88:363 89:1806 90:303 91:5197 92:578
93:1547 94:1619 95:1170 96:416 97:319 98:885
99:39 100:23 101:261 103:1526 105:512 106:119
107:198 108:455 109:1937 110:796 111:965 112:449
113:707 114:657 115:839 116:891 117:730 118:935
119:1265 120:306 121:688 122:1649 123:1159 124:1347
125:1282 128:548 129:184 130:282 131:632 132:297
133:22 134:250 135:61 136:217 137:239 138:342
139:171 140:500 141:280 142:487 143:372 144:496
145:80 146:516 147:257 148:759 149:324 150:157
151:173 152:451 153:183 154:20 155:420 156:222
157:381 158:186 159:649 160:343 161:414 162:359
163:191 164:693 165:419 166:530 167:548 168:964
169:125 170:908 171:150 172:7 173:1692 174:632
175:440 176:801 177:1185 178:1661 180:1346 181:136
182:1050 183:295 184:603 186:2239 187:1242 188:1526
189:1578 190:6072 192:6032 193:5725 194:4556 195:3454
196:1212 197:220 198:3784 199:4994 200:6014 201:1973
202:8726 203:8723 204:4428 205:2538 206:2779 207:2876
208:4057 209:3660 210:2834 211:1533 212:2034 213:1806
214:898 215:87 216:5114 217:1552 218:568 219:315
220:1236 221:536 222:335 223:384

End of report
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