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, September 16, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 17 Sep, 2012

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

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

BGP routing table entries examined: 426570
Prefixes after maximum aggregation: 177904
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 207108
Total ASes present in the Internet Routing Table: 42101
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33613
Origin ASes announcing only one prefix: 15764
Transit ASes present in the Internet Routing Table: 5607
Transit-only ASes present in the Internet Routing Table: 140
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: 714
Unregistered ASNs in the Routing Table: 252
Number of 32-bit ASNs allocated by the RIRs: 3288
Number of 32-bit ASNs visible in the Routing Table: 2881
Prefixes from 32-bit ASNs in the Routing Table: 7620
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 164
Number of addresses announced to Internet: 2595707084
Equivalent to 154 /8s, 183 /16s and 88 /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: 150318

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

Prefixes being announced by APNIC Region ASes: 102591
Total APNIC prefixes after maximum aggregation: 32488
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103214
Unique aggregates announced from the APNIC address blocks: 42678
APNIC Region origin ASes present in the Internet Routing Table: 4760
APNIC Prefixes per ASN: 21.68
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 768
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: 309
Number of APNIC addresses announced to Internet: 707862336
Equivalent to 42 /8s, 49 /16s and 31 /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: 154256
Total ARIN prefixes after maximum aggregation: 78037
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155248
Unique aggregates announced from the ARIN address blocks: 69105
ARIN Region origin ASes present in the Internet Routing Table: 15235
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5748
ARIN Region transit ASes present in the Internet Routing Table: 1601
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: 1084122240
Equivalent to 64 /8s, 158 /16s and 100 /24s
Percentage of available ARIN address space announced: 57.4

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: 108519
Total RIPE prefixes after maximum aggregation: 56640
RIPE Deaggregation factor: 1.92
Prefixes being announced from the RIPE address blocks: 110997
Unique aggregates announced from the RIPE address blocks: 70000
RIPE Region origin ASes present in the Internet Routing Table: 16842
RIPE Prefixes per ASN: 6.59
RIPE Region origin ASes announcing only one prefix: 8162
RIPE Region transit ASes present in the Internet Routing Table: 2703
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: 1877
Number of RIPE addresses announced to Internet: 645411556
Equivalent to 38 /8s, 120 /16s and 50 /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: 43680
Total LACNIC prefixes after maximum aggregation: 8477
LACNIC Deaggregation factor: 5.15
Prefixes being announced from the LACNIC address blocks: 46683
Unique aggregates announced from the LACNIC address blocks: 21726
LACNIC Region origin ASes present in the Internet Routing Table: 1649
LACNIC Prefixes per ASN: 28.31
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 322
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: 672
Number of LACNIC addresses announced to Internet: 116221480
Equivalent to 6 /8s, 237 /16s and 102 /24s
Percentage of available LACNIC address space announced: 69.3

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: 9783
Total AfriNIC prefixes after maximum aggregation: 2205
AfriNIC Deaggregation factor: 4.44
Prefixes being announced from the AfriNIC address blocks: 10264
Unique aggregates announced from the AfriNIC address blocks: 3464
AfriNIC Region origin ASes present in the Internet Routing Table: 561
AfriNIC Prefixes per ASN: 18.30
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: 41810176
Equivalent to 2 /8s, 125 /16s and 249 /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 2976 11429 901 Korea Telecom (KIX)
17974 2341 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1756 301 85 TPG Internet Pty Ltd
4755 1618 387 162 TATA Communications formerly
9829 1334 1106 41 BSNL National Internet Backbo
9583 1177 87 513 Sify Limited
7552 1129 1062 11 Vietel Corporation
4808 1124 2049 318 CNCGROUP IP network: China169
24560 1041 386 160 Bharti Airtel Ltd., Telemedia
9498 1010 310 74 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 3328 3734 185 bellsouth.net, inc.
7029 3155 990 161 Windstream Communications Inc
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications, Inc.
20115 1659 1580 615 Charter Communications
4323 1575 1153 386 Time Warner Telecom
30036 1388 273 744 Mediacom Communications Corp
7018 1245 10317 830 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 1706 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1226 2247 55 LDCOM NETWORKS
12479 846 773 79 Uni2 Autonomous System
34984 766 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 720 230 552 Akamai Technologies European
31148 709 37 9 FreeNet ISP
13188 693 100 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 2155 368 223 TVCABLE BOGOTA
28573 2140 1248 54 NET Servicos de Comunicao S.A
8151 1573 3034 349 UniNet S.A. de C.V.
7303 1565 1034 199 Telecom Argentina Stet-France
6503 1533 435 68 AVANTEL, S.A.
6458 750 81 15 GUATEL
27947 722 74 94 Telconet S.A
3816 644 310 30 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
14420 580 83 101 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 207 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 3328 3734 185 bellsouth.net, inc.
7029 3155 990 161 Windstream Communications Inc
4766 2976 11429 901 Korea Telecom (KIX)
17974 2341 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2155 368 223 TVCABLE BOGOTA
28573 2140 1248 54 NET Servicos de Comunicao S.A
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications, Inc.
7545 1756 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 3155 2994 Windstream Communications Inc
17974 2341 2287 PT TELEKOMUNIKASI INDONESIA
28573 2140 2086 NET Servicos de Comunicao S.A
4766 2976 2075 Korea Telecom (KIX)
10620 2155 1932 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1885 1756 Cox Communications, Inc.
8402 1706 1690 Corbina telecom
7545 1756 1671 TPG Internet Pty Ltd

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
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.

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.80.0/20 52041 Timer LTD

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
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
/13:477 /14:844 /15:1545 /16:12393 /17:6460 /18:10848
/19:21084 /20:30243 /21:32173 /22:42425 /23:39867 /24:223547
/25:1407 /26:1674 /27:924 /28:172 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2642 3155 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1850 3328 bellsouth.net, inc.
8402 1428 1706 Corbina telecom
30036 1323 1388 Mediacom Communications Corp
22773 1226 1885 Cox Communications, Inc.
15557 1170 1226 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1053 1533 AVANTEL, S.A.
1785 1014 1912 PaeTec Communications, Inc.

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

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

1:606 2:595 3:1 4:13 5:486 6:3
8:457 12:1999 13:1 14:664 15:11 16:3
17:6 20:27 23:206 24:1791 27:1334 31:1022
32:56 33:2 34:2 36:7 37:754 38:827
39:2 40:133 41:3049 42:158 44:3 46:1588
47:2 49:477 50:595 52:13 54:18 55:7
56:1 57:31 58:987 59:532 60:241 61:1292
62:950 63:1994 64:4271 65:2240 66:4501 67:2037
68:1170 69:3216 70:985 71:509 72:1871 74:2600
75:483 76:313 77:949 78:968 79:489 80:1264
81:958 82:626 83:532 84:625 85:1156 86:810
87:927 88:363 89:1806 90:302 91:5207 92:580
93:1541 94:1620 95:1249 96:416 97:319 98:991
99:39 100:23 101:261 103:1536 105:512 106:118
107:198 108:455 109:1938 110:797 111:967 112:447
113:704 114:654 115:841 116:891 117:728 118:935
119:1267 120:307 121:688 122:1645 123:1162 124:1344
125:1284 128:551 129:185 130:282 131:620 132:310
133:22 134:250 135:61 136:218 137:239 138:338
139:171 140:500 141:283 142:486 143:363 144:488
145:80 146:518 147:256 148:755 149:324 150:156
151:170 152:451 153:183 154:20 155:417 156:226
157:380 158:186 159:653 160:343 161:414 162:358
163:190 164:689 165:421 166:530 167:550 168:962
169:125 170:908 171:149 172:7 173:1688 174:610
175:440 176:772 177:1136 178:1659 180:1351 181:136
182:1053 183:295 184:604 186:2215 187:1236 188:1529
189:1579 190:5984 192:6026 193:5728 194:4558 195:3458
196:1203 197:215 198:3787 199:5002 200:6002 201:1865
202:8708 203:8723 204:4428 205:2550 206:2776 207:2875
208:4071 209:3666 210:2835 211:1532 212:2030 213:1813
214:882 215:87 216:5137 217:1551 218:569 219:315
220:1242 221:536 222:335 223:386

End of report
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