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, August 23, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 24 Aug, 2012

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

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

BGP routing table entries examined: 422211
Prefixes after maximum aggregation: 177571
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 206257
Total ASes present in the Internet Routing Table: 41907
Prefixes per ASN: 10.07
Origin-only ASes present in the Internet Routing Table: 33508
Origin ASes announcing only one prefix: 15728
Transit ASes present in the Internet Routing Table: 5612
Transit-only ASes present in the Internet Routing Table: 137
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 764
Unregistered ASNs in the Routing Table: 219
Number of 32-bit ASNs allocated by the RIRs: 3162
Number of 32-bit ASNs visible in the Routing Table: 2787
Prefixes from 32-bit ASNs in the Routing Table: 7183
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 173
Number of addresses announced to Internet: 2590757388
Equivalent to 154 /8s, 107 /16s and 210 /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: 93.3
Total number of prefixes smaller than registry allocations: 148762

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

Prefixes being announced by APNIC Region ASes: 101566
Total APNIC prefixes after maximum aggregation: 32759
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102151
Unique aggregates announced from the APNIC address blocks: 42465
APNIC Region origin ASes present in the Internet Routing Table: 4741
APNIC Prefixes per ASN: 21.55
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 761
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 286
Number of APNIC addresses announced to Internet: 707624320
Equivalent to 42 /8s, 45 /16s and 125 /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: 153893
Total ARIN prefixes after maximum aggregation: 77985
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 154896
Unique aggregates announced from the ARIN address blocks: 68919
ARIN Region origin ASes present in the Internet Routing Table: 15228
ARIN Prefixes per ASN: 10.17
ARIN Region origin ASes announcing only one prefix: 5754
ARIN Region transit ASes present in the Internet Routing Table: 1608
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: 1085460864
Equivalent to 64 /8s, 178 /16s and 209 /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: 106772
Total RIPE prefixes after maximum aggregation: 56134
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109035
Unique aggregates announced from the RIPE address blocks: 69185
RIPE Region origin ASes present in the Internet Routing Table: 16790
RIPE Prefixes per ASN: 6.49
RIPE Region origin ASes announcing only one prefix: 8135
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: 1815
Number of RIPE addresses announced to Internet: 640974564
Equivalent to 38 /8s, 52 /16s and 126 /24s
Percentage of available RIPE address space announced: 93.2

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: 43085
Total LACNIC prefixes after maximum aggregation: 8438
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 45932
Unique aggregates announced from the LACNIC address blocks: 22068
LACNIC Region origin ASes present in the Internet Routing Table: 1633
LACNIC Prefixes per ASN: 28.13
LACNIC Region origin ASes announcing only one prefix: 426
LACNIC Region transit ASes present in the Internet Routing Table: 313
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: 663
Number of LACNIC addresses announced to Internet: 114577704
Equivalent to 6 /8s, 212 /16s and 81 /24s
Percentage of available LACNIC address space announced: 68.3

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: 9565
Total AfriNIC prefixes after maximum aggregation: 2201
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 10024
Unique aggregates announced from the AfriNIC address blocks: 3482
AfriNIC Region origin ASes present in the Internet Routing Table: 558
AfriNIC Prefixes per ASN: 17.96
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 123
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: 41680896
Equivalent to 2 /8s, 124 /16s and 0 /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 2808 11119 1292 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1725 301 85 TPG Internet Pty Ltd
4755 1608 386 158 TATA Communications formerly
9829 1311 1100 27 BSNL National Internet Backbo
9583 1171 86 510 Sify Limited
4808 1127 2052 322 CNCGROUP IP network: China169
7552 1106 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 999 294 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
7029 3450 990 154 Windstream Communications Inc
6389 3363 3772 192 bellsouth.net, inc.
18566 2087 382 180 Covad Communications
1785 1940 680 128 PaeTec Communications, Inc.
22773 1826 2930 128 Cox Communications, Inc.
20115 1647 1575 608 Charter Communications
4323 1573 1026 386 Time Warner Telecom
30036 1376 272 792 Mediacom Communications Corp
7018 1244 10291 812 AT&T WorldNet Services
11492 1197 217 345 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 1592 544 16 Corbina telecom
15557 1218 2247 55 LDCOM NETWORKS
12479 828 764 85 Uni2 Autonomous System
34984 750 189 175 BILISIM TELEKOM
6830 721 2313 448 UPC Distribution Services
31148 712 37 9 FreeNet ISP
20940 706 226 549 Akamai Technologies European
2118 685 97 14 EUnet/RELCOM Autonomous Syste
13188 657 100 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 2093 356 215 TVCABLE BOGOTA
28573 2047 1244 55 NET Servicos de Comunicao S.A
7303 1565 1034 200 Telecom Argentina Stet-France
8151 1474 3032 345 UniNet S.A. de C.V.
6503 1423 435 68 AVANTEL, S.A.
6458 880 81 15 GUATEL
27947 718 74 95 Telconet S.A
3816 602 255 90 Empresa Nacional de Telecomun
11172 591 85 70 Servicios Alestra S.A de C.V
22047 580 326 15 VTR PUNTO NET S.A.

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
8452 878 958 13 TEDATA
24863 869 275 36 LINKdotNET AS number
36998 534 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 193 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 169 680 87 MTN Network Solutions

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 3450 990 154 Windstream Communications Inc
6389 3363 3772 192 bellsouth.net, inc.
4766 2808 11119 1292 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2093 356 215 TVCABLE BOGOTA
18566 2087 382 180 Covad Communications
28573 2047 1244 55 NET Servicos de Comunicao S.A
1785 1940 680 128 PaeTec Communications, Inc.
22773 1826 2930 128 Cox Communications, Inc.
7545 1725 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
6389 3363 3171 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2047 1992 NET Servicos de Comunicao S.A
18566 2087 1907 Covad Communications
10620 2093 1878 TVCABLE BOGOTA
1785 1940 1812 PaeTec Communications, Inc.
22773 1826 1698 Cox Communications, Inc.
7545 1725 1640 TPG Internet Pty Ltd
8402 1592 1576 Corbina telecom
4766 2808 1516 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
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.
59457 UNALLOCATED 5.149.68.0/24 35567 DASTO semtel d.o.o.

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

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

Network Origin AS Description
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
41.207.224.0/23 36898 UniNet Communications

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 /8:19 /9:14 /10:29 /11:84 /12:237
/13:475 /14:841 /15:1534 /16:12354 /17:6394 /18:10800
/19:20935 /20:30041 /21:31758 /22:41896 /23:39736 /24:221129
/25:1272 /26:1508 /27:877 /28:173 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2810 3450 Windstream Communications Inc
18566 2037 2087 Covad Communications
6389 1856 3363 bellsouth.net, inc.
8402 1320 1592 Corbina telecom
30036 1310 1376 Mediacom Communications Corp
22773 1175 1826 Cox Communications, Inc.
15557 1162 1218 LDCOM NETWORKS
11492 1160 1197 Cable One
1785 1040 1940 PaeTec Communications, Inc.
6503 977 1423 AVANTEL, S.A.

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

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

1:564 2:793 3:1 4:13 5:364 6:3
8:440 12:2005 13:1 14:647 15:11 16:3
17:6 20:27 23:196 24:1802 27:1324 31:1030
32:56 33:2 34:2 36:8 37:735 38:823
39:1 40:133 41:2815 42:155 44:3 46:1575
47:2 49:468 50:589 52:13 54:17 55:7
56:1 57:31 58:990 59:524 60:238 61:1284
62:993 63:2006 64:4263 65:2246 66:4520 67:2045
68:1155 69:3207 70:989 71:525 72:1861 74:2570
75:491 76:330 77:951 78:904 79:490 80:1280
81:956 82:636 83:533 84:623 85:1134 86:786
87:927 88:350 89:1808 90:301 91:5125 92:590
93:1483 94:1589 95:1266 96:397 97:317 98:901
99:39 100:22 101:260 103:1424 105:512 106:115
107:195 108:431 109:1909 110:796 111:954 112:428
113:684 114:653 115:847 116:885 117:726 118:935
119:1246 120:300 121:691 122:1656 123:1173 124:1355
125:1265 128:524 129:185 130:275 131:627 132:300
133:22 134:245 135:61 136:215 137:239 138:339
139:185 140:501 141:274 142:483 143:364 144:485
145:79 146:510 147:259 148:766 149:300 150:156
151:168 152:458 153:176 154:20 155:413 156:224
157:383 158:179 159:630 160:348 161:409 162:404
163:189 164:689 165:412 166:561 167:540 168:956
169:125 170:907 171:145 172:5 173:1715 174:630
175:437 176:603 177:1038 178:1683 180:1342 181:125
182:1037 183:223 184:584 186:2126 187:1077 188:1466
189:1550 190:6135 192:6025 193:5457 194:4234 195:3263
196:1221 197:205 198:3739 199:4932 200:5973 201:1970
202:8713 203:8666 204:4405 205:2536 206:2815 207:2875
208:4045 209:3643 210:2796 211:1541 212:2022 213:1804
214:885 215:85 216:5136 217:1551 218:545 219:307
220:1239 221:530 222:339 223:375

End of report
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