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.

Tuesday, September 4, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 05 Sep, 2012

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

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

BGP routing table entries examined: 424517
Prefixes after maximum aggregation: 177980
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207135
Total ASes present in the Internet Routing Table: 41999
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33561
Origin ASes announcing only one prefix: 15741
Transit ASes present in the Internet Routing Table: 5602
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: 702
Unregistered ASNs in the Routing Table: 238
Number of 32-bit ASNs allocated by the RIRs: 3208
Number of 32-bit ASNs visible in the Routing Table: 2836
Prefixes from 32-bit ASNs in the Routing Table: 7427
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 179
Number of addresses announced to Internet: 2592195116
Equivalent to 154 /8s, 129 /16s and 194 /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: 93.4
Total number of prefixes smaller than registry allocations: 149984

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

Prefixes being announced by APNIC Region ASes: 102017
Total APNIC prefixes after maximum aggregation: 32860
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102638
Unique aggregates announced from the APNIC address blocks: 42611
APNIC Region origin ASes present in the Internet Routing Table: 4746
APNIC Prefixes per ASN: 21.63
APNIC Region origin ASes announcing only one prefix: 1244
APNIC Region transit ASes present in the Internet Routing Table: 760
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: 292
Number of APNIC addresses announced to Internet: 707655584
Equivalent to 42 /8s, 45 /16s and 247 /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: 154101
Total ARIN prefixes after maximum aggregation: 77954
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155079
Unique aggregates announced from the ARIN address blocks: 69098
ARIN Region origin ASes present in the Internet Routing Table: 15225
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5747
ARIN Region transit ASes present in the Internet Routing Table: 1597
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: 1083242880
Equivalent to 64 /8s, 144 /16s and 249 /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: 107353
Total RIPE prefixes after maximum aggregation: 56440
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109733
Unique aggregates announced from the RIPE address blocks: 69705
RIPE Region origin ASes present in the Internet Routing Table: 16824
RIPE Prefixes per ASN: 6.52
RIPE Region origin ASes announcing only one prefix: 8149
RIPE Region transit ASes present in the Internet Routing Table: 2712
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: 1849
Number of RIPE addresses announced to Internet: 643136996
Equivalent to 38 /8s, 85 /16s and 125 /24s
Percentage of available RIPE address space announced: 93.5

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: 43609
Total LACNIC prefixes after maximum aggregation: 8463
LACNIC Deaggregation factor: 5.15
Prefixes being announced from the LACNIC address blocks: 46555
Unique aggregates announced from the LACNIC address blocks: 22116
LACNIC Region origin ASes present in the Internet Routing Table: 1636
LACNIC Prefixes per ASN: 28.46
LACNIC Region origin ASes announcing only one prefix: 429
LACNIC Region transit ASes present in the Internet Routing Table: 319
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: 114995752
Equivalent to 6 /8s, 218 /16s and 178 /24s
Percentage of available LACNIC address space announced: 68.5

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: 9874
Total AfriNIC prefixes after maximum aggregation: 2206
AfriNIC Deaggregation factor: 4.48
Prefixes being announced from the AfriNIC address blocks: 10333
Unique aggregates announced from the AfriNIC address blocks: 3458
AfriNIC Region origin ASes present in the Internet Routing Table: 560
AfriNIC Prefixes per ASN: 18.45
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: 41675520
Equivalent to 2 /8s, 123 /16s and 235 /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 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1752 301 86 TPG Internet Pty Ltd
4755 1614 386 160 TATA Communications formerly
9829 1318 1100 27 BSNL National Internet Backbo
9583 1177 87 507 Sify Limited
4808 1123 2074 322 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1003 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 3457 990 154 Windstream Communications Inc
6389 3341 3737 185 bellsouth.net, inc.
18566 2086 382 179 Covad Communications
1785 1913 678 129 PaeTec Communications, Inc.
22773 1869 2930 128 Cox Communications, Inc.
20115 1657 1576 614 Charter Communications
4323 1578 1026 386 Time Warner Telecom
30036 1439 282 724 Mediacom Communications Corp
7018 1256 10316 828 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 1696 544 16 Corbina telecom
15557 1221 2247 55 LDCOM NETWORKS
12479 831 766 80 Uni2 Autonomous System
34984 753 189 177 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
2118 715 97 14 EUnet/RELCOM Autonomous Syste
31148 710 37 9 FreeNet ISP
20940 706 224 548 Akamai Technologies European
13188 681 100 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
28573 2130 1248 54 NET Servicos de Comunicao S.A
10620 2125 362 226 TVCABLE BOGOTA
8151 1572 3034 347 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1533 451 69 AVANTEL, S.A.
6458 839 81 15 GUATEL
27947 720 74 94 Telconet S.A
3816 638 262 95 Empresa Nacional de Telecomun
11172 593 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
24863 870 275 36 LINKdotNET AS number
8452 834 958 13 TEDATA
36998 777 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 267 80 8 RAYA Telecom - Egypt
3741 262 904 223 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 3457 990 154 Windstream Communications Inc
6389 3341 3737 185 bellsouth.net, inc.
4766 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
28573 2130 1248 54 NET Servicos de Comunicao S.A
10620 2125 362 226 TVCABLE BOGOTA
18566 2086 382 179 Covad Communications
1785 1913 678 129 PaeTec Communications, Inc.
22773 1869 2930 128 Cox Communications, Inc.
7545 1752 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
6389 3341 3156 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2130 2076 NET Servicos de Comunicao S.A
18566 2086 1907 Covad Communications
10620 2125 1899 TVCABLE BOGOTA
1785 1913 1784 PaeTec Communications, Inc.
22773 1869 1741 Cox Communications, Inc.
8402 1696 1680 Corbina telecom
7545 1752 1666 TPG Internet Pty Ltd
4766 2951 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
59441 UNALLOCATED 5.144.130.0/24 51074 Gostaresh Ertebatate
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.

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

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

Network Origin AS Description
5.208.0.0/12 51074 Gostaresh Ertebatate Mabna Co
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
/13:475 /14:843 /15:1539 /16:12374 /17:6410 /18:10831
/19:21035 /20:30208 /21:31966 /22:42212 /23:39841 /24:222360
/25:1316 /26:1539 /27:909 /28:171 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2813 3457 Windstream Communications Inc
18566 2036 2086 Covad Communications
6389 1852 3341 bellsouth.net, inc.
8402 1418 1696 Corbina telecom
30036 1372 1439 Mediacom Communications Corp
22773 1217 1869 Cox Communications, Inc.
15557 1165 1221 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1533 AVANTEL, S.A.
1785 1013 1913 PaeTec Communications, Inc.

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

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

1:566 2:789 3:1 4:13 5:396 6:3
8:450 12:2005 13:1 14:661 15:11 16:3
17:6 20:27 23:204 24:1820 27:1326 31:1032
32:56 33:2 34:2 36:7 37:754 38:828
39:2 40:133 41:3110 42:158 44:3 46:1556
47:2 49:471 50:599 52:13 54:17 55:5
56:1 57:31 58:995 59:530 60:240 61:1288
62:1007 63:2005 64:4261 65:2242 66:4491 67:2038
68:1171 69:3192 70:985 71:523 72:1868 74:2576
75:495 76:323 77:947 78:939 79:487 80:1281
81:951 82:638 83:532 84:625 85:1155 86:805
87:924 88:349 89:1794 90:303 91:5174 92:580
93:1527 94:1573 95:1278 96:414 97:317 98:899
99:39 100:23 101:262 103:1462 105:512 106:118
107:198 108:438 109:1909 110:796 111:957 112:433
113:683 114:645 115:853 116:880 117:732 118:946
119:1244 120:307 121:691 122:1655 123:1169 124:1346
125:1270 128:553 129:186 130:282 131:632 132:320
133:22 134:250 135:61 136:217 137:239 138:341
139:187 140:501 141:276 142:486 143:362 144:484
145:82 146:514 147:254 148:764 149:296 150:158
151:174 152:452 153:182 154:20 155:419 156:222
157:381 158:179 159:640 160:343 161:411 162:408
163:190 164:694 165:417 166:562 167:541 168:956
169:125 170:907 171:145 172:6 173:1719 174:620
175:442 176:572 177:1117 178:1654 180:1352 181:132
182:1042 183:230 184:590 186:2190 187:1228 188:1550
189:1584 190:6132 192:6026 193:5510 194:4247 195:3270
196:1221 197:213 198:3758 199:4966 200:5960 201:1970
202:8702 203:8700 204:4409 205:2539 206:2751 207:2873
208:4057 209:3649 210:2822 211:1521 212:2031 213:1808
214:884 215:86 216:5140 217:1551 218:548 219:316
220:1241 221:530 222:339 223:373

End of report
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