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, August 20, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 21 Aug, 2012

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

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

BGP routing table entries examined: 422378
Prefixes after maximum aggregation: 177386
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 206091
Total ASes present in the Internet Routing Table: 41865
Prefixes per ASN: 10.09
Origin-only ASes present in the Internet Routing Table: 33486
Origin ASes announcing only one prefix: 15723
Transit ASes present in the Internet Routing Table: 5611
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: 559
Unregistered ASNs in the Routing Table: 184
Number of 32-bit ASNs allocated by the RIRs: 3143
Number of 32-bit ASNs visible in the Routing Table: 2768
Prefixes from 32-bit ASNs in the Routing Table: 7173
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 164
Number of addresses announced to Internet: 2588354188
Equivalent to 154 /8s, 71 /16s and 38 /24s
Percentage of available address space announced: 69.8
Percentage of allocated address space announced: 69.9
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.2
Total number of prefixes smaller than registry allocations: 148856

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

Prefixes being announced by APNIC Region ASes: 101837
Total APNIC prefixes after maximum aggregation: 32674
APNIC Deaggregation factor: 3.12
Prefixes being announced from the APNIC address blocks: 102419
Unique aggregates announced from the APNIC address blocks: 42454
APNIC Region origin ASes present in the Internet Routing Table: 4739
APNIC Prefixes per ASN: 21.61
APNIC Region origin ASes announcing only one prefix: 1242
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: 284
Number of APNIC addresses announced to Internet: 707149440
Equivalent to 42 /8s, 38 /16s and 62 /24s
Percentage of available APNIC address space announced: 82.6

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: 153726
Total ARIN prefixes after maximum aggregation: 77879
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 154742
Unique aggregates announced from the ARIN address blocks: 68787
ARIN Region origin ASes present in the Internet Routing Table: 15224
ARIN Prefixes per ASN: 10.16
ARIN Region origin ASes announcing only one prefix: 5756
ARIN Region transit ASes present in the Internet Routing Table: 1604
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: 1084177792
Equivalent to 64 /8s, 159 /16s and 61 /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: 106658
Total RIPE prefixes after maximum aggregation: 56137
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 108890
Unique aggregates announced from the RIPE address blocks: 69129
RIPE Region origin ASes present in the Internet Routing Table: 16779
RIPE Prefixes per ASN: 6.49
RIPE Region origin ASes announcing only one prefix: 8129
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: 1800
Number of RIPE addresses announced to Internet: 640800228
Equivalent to 38 /8s, 49 /16s and 213 /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: 43179
Total LACNIC prefixes after maximum aggregation: 8448
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 46043
Unique aggregates announced from the LACNIC address blocks: 22141
LACNIC Region origin ASes present in the Internet Routing Table: 1627
LACNIC Prefixes per ASN: 28.30
LACNIC Region origin ASes announcing only one prefix: 425
LACNIC Region transit ASes present in the Internet Routing Table: 317
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: 661
Number of LACNIC addresses announced to Internet: 114228904
Equivalent to 6 /8s, 206 /16s and 254 /24s
Percentage of available LACNIC address space announced: 68.1

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: 9659
Total AfriNIC prefixes after maximum aggregation: 2193
AfriNIC Deaggregation factor: 4.40
Prefixes being announced from the AfriNIC address blocks: 10120
Unique aggregates announced from the AfriNIC address blocks: 3448
AfriNIC Region origin ASes present in the Internet Routing Table: 555
AfriNIC Prefixes per ASN: 18.23
AfriNIC Region origin ASes announcing only one prefix: 171
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: 41679104
Equivalent to 2 /8s, 123 /16s and 249 /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 2761 11117 1252 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1715 301 87 TPG Internet Pty Ltd
4755 1607 386 158 TATA Communications formerly
9829 1312 1084 31 BSNL National Internet Backbo
9583 1170 86 509 Sify Limited
4808 1136 2056 326 CNCGROUP IP network: China169
7552 1104 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 3446 990 154 Windstream Communications Inc
6389 3367 3772 192 bellsouth.net, inc.
18566 2087 382 180 Covad Communications
1785 1939 680 128 PaeTec Communications, Inc.
22773 1730 2914 127 Cox Communications, Inc.
20115 1650 1574 607 Charter Communications
4323 1574 1026 386 Time Warner Telecom
30036 1407 279 785 Mediacom Communications Corp
7018 1240 10034 808 AT&T WorldNet Services
11492 1194 217 348 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 1585 544 16 Corbina telecom
15557 1216 2247 55 LDCOM NETWORKS
12479 827 764 85 Uni2 Autonomous System
34984 750 189 175 BILISIM TELEKOM
6830 715 2311 446 UPC Distribution Services
31148 711 37 9 FreeNet ISP
20940 710 229 551 Akamai Technologies European
2118 685 97 14 EUnet/RELCOM Autonomous Syste
13188 656 100 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 2088 355 216 TVCABLE BOGOTA
28573 2010 1242 55 NET Servicos de Comunicao S.A
7303 1564 1033 201 Telecom Argentina Stet-France
6503 1530 435 68 AVANTEL, S.A.
8151 1476 3038 345 UniNet S.A. de C.V.
6458 882 81 15 GUATEL
27947 715 74 95 Telconet S.A
3816 602 255 90 Empresa Nacional de Telecomun
11172 590 85 69 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 892 958 13 TEDATA
24863 869 275 36 LINKdotNET AS number
36998 532 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 195 28 62 Vodacom Internet Company
33776 194 13 11 Starcomms Nigeria Limited
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 3446 990 154 Windstream Communications Inc
6389 3367 3772 192 bellsouth.net, inc.
4766 2761 11117 1252 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2088 355 216 TVCABLE BOGOTA
18566 2087 382 180 Covad Communications
28573 2010 1242 55 NET Servicos de Comunicao S.A
1785 1939 680 128 PaeTec Communications, Inc.
22773 1730 2914 127 Cox Communications, Inc.
7545 1715 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 3367 3175 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2010 1955 NET Servicos de Comunicao S.A
18566 2087 1907 Covad Communications
10620 2088 1872 TVCABLE BOGOTA
1785 1939 1811 PaeTec Communications, Inc.
7545 1715 1628 TPG Internet Pty Ltd
22773 1730 1603 Cox Communications, Inc.
8402 1585 1569 Corbina telecom
4766 2761 1509 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 43179 RIPE Network Coordin

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
31.169.48.0/21 50304 Blix Solutions AS

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 /12:236
/13:475 /14:839 /15:1531 /16:12350 /17:6381 /18:10775
/19:21013 /20:30065 /21:31976 /22:41907 /23:39702 /24:221095
/25:1256 /26:1505 /27:851 /28:171 /29:62 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2806 3446 Windstream Communications Inc
18566 2037 2087 Covad Communications
6389 1856 3367 bellsouth.net, inc.
30036 1342 1407 Mediacom Communications Corp
8402 1310 1585 Corbina telecom
15557 1160 1216 LDCOM NETWORKS
11492 1157 1194 Cable One
22773 1136 1730 Cox Communications, Inc.
6503 1051 1530 AVANTEL, S.A.
1785 1041 1939 PaeTec Communications, Inc.

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

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

1:563 2:787 3:1 4:13 5:355 6:3
8:440 12:2007 13:1 14:642 15:11 16:3
17:6 20:27 23:205 24:1800 27:1335 31:1032
32:56 33:2 34:2 36:8 37:732 38:823
39:1 40:133 41:2870 42:156 44:3 46:1579
47:2 49:436 50:585 52:13 54:16 55:6
56:1 57:31 58:988 59:518 60:238 61:1283
62:993 63:2008 64:4263 65:2246 66:4537 67:2053
68:1159 69:3205 70:987 71:523 72:1866 74:2605
75:491 76:330 77:950 78:907 79:498 80:1273
81:956 82:636 83:534 84:623 85:1132 86:787
87:936 88:350 89:1807 90:300 91:5109 92:590
93:1475 94:1585 95:1270 96:407 97:317 98:897
99:39 100:22 101:257 103:1408 105:512 106:113
107:193 108:429 109:1914 110:798 111:955 112:433
113:679 114:656 115:836 116:881 117:726 118:938
119:1259 120:300 121:693 122:1654 123:1164 124:1351
125:1265 128:525 129:185 130:275 131:626 132:300
133:22 134:246 135:61 136:218 137:239 138:338
139:184 140:501 141:268 142:483 143:325 144:475
145:79 146:511 147:255 148:778 149:300 150:153
151:168 152:458 153:175 154:20 155:414 156:225
157:382 158:179 159:639 160:346 161:411 162:401
163:189 164:681 165:412 166:563 167:535 168:954
169:125 170:905 171:145 172:5 173:1725 174:631
175:438 176:604 177:1037 178:1678 180:1342 181:123
182:1035 183:221 184:589 186:2078 187:1134 188:1469
189:1577 190:6166 192:6012 193:5457 194:4237 195:3258
196:1232 197:205 198:3718 199:4917 200:6027 201:1969
202:8694 203:8655 204:4395 205:2537 206:2816 207:2859
208:4042 209:3640 210:2773 211:1540 212:2018 213:1807
214:869 215:85 216:5114 217:1548 218:548 219:316
220:1240 221:530 222:337 223:381

End of report
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