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.

Monday, September 10, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 11 Sep, 2012

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

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

BGP routing table entries examined: 426306
Prefixes after maximum aggregation: 178298
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207584
Total ASes present in the Internet Routing Table: 42063
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33593
Origin ASes announcing only one prefix: 15753
Transit ASes present in the Internet Routing Table: 5603
Transit-only ASes present in the Internet Routing Table: 134
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: 719
Unregistered ASNs in the Routing Table: 253
Number of 32-bit ASNs allocated by the RIRs: 3241
Number of 32-bit ASNs visible in the Routing Table: 2867
Prefixes from 32-bit ASNs in the Routing Table: 7575
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 178
Number of addresses announced to Internet: 2593819660
Equivalent to 154 /8s, 154 /16s and 140 /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: 93.5
Total number of prefixes smaller than registry allocations: 150242

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

Prefixes being announced by APNIC Region ASes: 102546
Total APNIC prefixes after maximum aggregation: 33015
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 103162
Unique aggregates announced from the APNIC address blocks: 42725
APNIC Region origin ASes present in the Internet Routing Table: 4759
APNIC Prefixes per ASN: 21.68
APNIC Region origin ASes announcing only one prefix: 1242
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: 28
Number of APNIC region 32-bit ASNs visible in the Routing Table: 298
Number of APNIC addresses announced to Internet: 707952768
Equivalent to 42 /8s, 50 /16s and 128 /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: 154331
Total ARIN prefixes after maximum aggregation: 78007
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155319
Unique aggregates announced from the ARIN address blocks: 69116
ARIN Region origin ASes present in the Internet Routing Table: 15228
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5744
ARIN Region transit ASes present in the Internet Routing Table: 1594
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: 1083482496
Equivalent to 64 /8s, 148 /16s and 161 /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: 108111
Total RIPE prefixes after maximum aggregation: 56562
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 110570
Unique aggregates announced from the RIPE address blocks: 69913
RIPE Region origin ASes present in the Internet Routing Table: 16841
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8158
RIPE Region transit ASes present in the Internet Routing Table: 2718
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: 1869
Number of RIPE addresses announced to Internet: 644805092
Equivalent to 38 /8s, 110 /16s and 241 /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: 43710
Total LACNIC prefixes after maximum aggregation: 8447
LACNIC Deaggregation factor: 5.17
Prefixes being announced from the LACNIC address blocks: 46709
Unique aggregates announced from the LACNIC address blocks: 22233
LACNIC Region origin ASes present in the Internet Routing Table: 1642
LACNIC Prefixes per ASN: 28.45
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 318
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: 677
Number of LACNIC addresses announced to Internet: 115467816
Equivalent to 6 /8s, 225 /16s and 230 /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: 9899
Total AfriNIC prefixes after maximum aggregation: 2210
AfriNIC Deaggregation factor: 4.48
Prefixes being announced from the AfriNIC address blocks: 10368
Unique aggregates announced from the AfriNIC address blocks: 3453
AfriNIC Region origin ASes present in the Internet Routing Table: 559
AfriNIC Prefixes per ASN: 18.55
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 41800192
Equivalent to 2 /8s, 125 /16s and 210 /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 2950 11125 1418 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1753 301 87 TPG Internet Pty Ltd
4755 1618 387 162 TATA Communications formerly
9829 1329 1104 36 BSNL National Internet Backbo
4808 1201 2084 334 CNCGROUP IP network: China169
9583 1180 87 509 Sify Limited
7552 1127 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1007 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 3370 990 154 Windstream Communications Inc
6389 3332 3736 187 bellsouth.net, inc.
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications, Inc.
20115 1657 1578 614 Charter Communications
4323 1581 1026 386 Time Warner Telecom
30036 1409 277 756 Mediacom Communications Corp
7018 1262 10317 833 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 1723 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1223 2247 55 LDCOM NETWORKS
12479 830 765 82 Uni2 Autonomous System
34984 760 205 178 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 717 230 554 Akamai Technologies European
31148 713 37 9 FreeNet ISP
13188 703 100 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 2140 364 220 TVCABLE BOGOTA
28573 2109 1248 54 NET Servicos de Comunicao S.A
8151 1576 3034 346 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 791 81 15 GUATEL
27947 721 74 94 Telconet S.A
3816 639 263 95 Empresa Nacional de Telecomun
11172 592 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 825 958 13 TEDATA
36998 774 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
7029 3370 990 154 Windstream Communications Inc
6389 3332 3736 187 bellsouth.net, inc.
4766 2950 11125 1418 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2140 364 220 TVCABLE BOGOTA
28573 2109 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 1753 301 87 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 3332 3145 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2109 2055 NET Servicos de Comunicao S.A
10620 2140 1920 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1885 1756 Cox Communications, Inc.
8402 1723 1707 Corbina telecom
7545 1753 1666 TPG Internet Pty Ltd
4766 2950 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
5.226.184.0/21 50478 BVOX AS
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
/13:476 /14:841 /15:1543 /16:12383 /17:6419 /18:10844
/19:21066 /20:30248 /21:32124 /22:42341 /23:39900 /24:223489
/25:1404 /26:1645 /27:920 /28:175 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2764 3370 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1849 3332 bellsouth.net, inc.
8402 1446 1723 Corbina telecom
30036 1342 1409 Mediacom Communications Corp
22773 1228 1885 Cox Communications, Inc.
15557 1167 1223 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)
----------------------------------------------

1:605 2:790 3:1 4:13 5:445 6:3
8:455 12:2001 13:1 14:663 15:11 16:3
17:6 20:27 23:203 24:1825 27:1333 31:896
32:56 33:2 34:2 36:7 37:757 38:825
39:2 40:133 41:3130 42:158 44:3 46:1558
47:2 49:467 50:591 52:13 54:18 55:7
56:1 57:31 58:990 59:529 60:240 61:1291
62:954 63:2003 64:4265 65:2245 66:4498 67:2052
68:1170 69:3203 70:985 71:523 72:1870 74:2586
75:493 76:322 77:942 78:946 79:486 80:1261
81:957 82:630 83:533 84:625 85:1156 86:804
87:923 88:361 89:1804 90:303 91:5195 92:578
93:1547 94:1627 95:1270 96:416 97:318 98:882
99:39 100:23 101:261 103:1507 105:512 106:119
107:198 108:445 109:1921 110:795 111:968 112:450
113:707 114:658 115:854 116:891 117:734 118:938
119:1263 120:307 121:689 122:1654 123:1169 124:1346
125:1274 128:549 129:186 130:282 131:632 132:311
133:22 134:251 135:61 136:216 137:238 138:342
139:176 140:501 141:280 142:486 143:368 144:494
145:80 146:508 147:281 148:758 149:324 150:157
151:176 152:451 153:182 154:20 155:420 156:222
157:380 158:186 159:646 160:343 161:414 162:403
163:190 164:693 165:417 166:563 167:547 168:962
169:125 170:905 171:149 172:6 173:1715 174:628
175:445 176:573 177:1100 178:1660 180:1358 181:134
182:1044 183:292 184:597 186:2202 187:1231 188:1531
189:1574 190:6092 192:6027 193:5716 194:4558 195:3450
196:1214 197:220 198:3776 199:4977 200:5987 201:1966
202:8723 203:8701 204:4429 205:2554 206:2766 207:2873
208:4058 209:3666 210:2833 211:1539 212:2025 213:1809
214:867 215:88 216:5133 217:1554 218:548 219:316
220:1238 221:532 222:339 223:379

End of report
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