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.

Wednesday, September 12, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 13 Sep, 2012

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

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

BGP routing table entries examined: 426554
Prefixes after maximum aggregation: 178373
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207201
Total ASes present in the Internet Routing Table: 42071
Prefixes per ASN: 10.14
Origin-only ASes present in the Internet Routing Table: 33590
Origin ASes announcing only one prefix: 15760
Transit ASes present in the Internet Routing Table: 5613
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: 715
Unregistered ASNs in the Routing Table: 255
Number of 32-bit ASNs allocated by the RIRs: 3247
Number of 32-bit ASNs visible in the Routing Table: 2868
Prefixes from 32-bit ASNs in the Routing Table: 7580
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 195
Number of addresses announced to Internet: 2595269324
Equivalent to 154 /8s, 176 /16s and 170 /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: 150498

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

Prefixes being announced by APNIC Region ASes: 102521
Total APNIC prefixes after maximum aggregation: 33022
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 103134
Unique aggregates announced from the APNIC address blocks: 42715
APNIC Region origin ASes present in the Internet Routing Table: 4758
APNIC Prefixes per ASN: 21.68
APNIC Region origin ASes announcing only one prefix: 1239
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: 304
Number of APNIC addresses announced to Internet: 707978560
Equivalent to 42 /8s, 50 /16s and 229 /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: 154350
Total ARIN prefixes after maximum aggregation: 78061
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155344
Unique aggregates announced from the ARIN address blocks: 69139
ARIN Region origin ASes present in the Internet Routing Table: 15232
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5739
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: 1084024960
Equivalent to 64 /8s, 156 /16s and 232 /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: 108311
Total RIPE prefixes after maximum aggregation: 56578
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 110741
Unique aggregates announced from the RIPE address blocks: 69823
RIPE Region origin ASes present in the Internet Routing Table: 16848
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8169
RIPE Region transit ASes present in the Internet Routing Table: 2723
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: 1873
Number of RIPE addresses announced to Internet: 644774372
Equivalent to 38 /8s, 110 /16s and 121 /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: 43811
Total LACNIC prefixes after maximum aggregation: 8444
LACNIC Deaggregation factor: 5.19
Prefixes being announced from the LACNIC address blocks: 46801
Unique aggregates announced from the LACNIC address blocks: 21911
LACNIC Region origin ASes present in the Internet Routing Table: 1636
LACNIC Prefixes per ASN: 28.61
LACNIC Region origin ASes announcing only one prefix: 438
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: 668
Number of LACNIC addresses announced to Internet: 116116520
Equivalent to 6 /8s, 235 /16s and 204 /24s
Percentage of available LACNIC address space announced: 69.2

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: 9859
Total AfriNIC prefixes after maximum aggregation: 2211
AfriNIC Deaggregation factor: 4.46
Prefixes being announced from the AfriNIC address blocks: 10339
Unique aggregates announced from the AfriNIC address blocks: 3452
AfriNIC Region origin ASes present in the Internet Routing Table: 562
AfriNIC Prefixes per ASN: 18.40
AfriNIC Region origin ASes announcing only one prefix: 175
AfriNIC Region transit ASes present in the Internet Routing Table: 129
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: 41798656
Equivalent to 2 /8s, 125 /16s and 204 /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 2948 11124 1416 Korea Telecom (KIX)
17974 2339 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1758 301 87 TPG Internet Pty Ltd
4755 1617 387 162 TATA Communications formerly
9829 1334 1106 41 BSNL National Internet Backbo
9583 1181 87 510 Sify Limited
7552 1125 1062 11 Vietel Corporation
4808 1123 2049 319 CNCGROUP IP network: China169
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1009 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
6389 3331 3735 184 bellsouth.net, inc.
7029 3153 990 161 Windstream Communications Inc
18566 2085 382 180 Covad Communications
1785 1911 678 127 PaeTec Communications, Inc.
22773 1886 2931 129 Cox Communications, Inc.
20115 1659 1580 615 Charter Communications
4323 1581 1154 387 Time Warner Telecom
30036 1394 274 746 Mediacom Communications Corp
7018 1241 10316 827 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 1717 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1224 2247 55 LDCOM NETWORKS
12479 840 771 78 Uni2 Autonomous System
34984 765 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 720 230 556 Akamai Technologies European
31148 712 37 9 FreeNet ISP
13188 699 100 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 2146 366 220 TVCABLE BOGOTA
28573 2138 1248 54 NET Servicos de Comunicao S.A
8151 1578 3034 348 UniNet S.A. de C.V.
7303 1565 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 792 81 15 GUATEL
27947 722 74 94 Telconet S.A
3816 643 310 30 Empresa Nacional de Telecomun
11172 593 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 835 275 36 LINKdotNET AS number
8452 819 958 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 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
6389 3331 3735 184 bellsouth.net, inc.
7029 3153 990 161 Windstream Communications Inc
4766 2948 11124 1416 Korea Telecom (KIX)
17974 2339 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2146 366 220 TVCABLE BOGOTA
28573 2138 1248 54 NET Servicos de Comunicao S.A
18566 2085 382 180 Covad Communications
1785 1911 678 127 PaeTec Communications, Inc.
22773 1886 2931 129 Cox Communications, Inc.
7545 1758 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
7029 3153 2992 Windstream Communications Inc
17974 2339 2285 PT TELEKOMUNIKASI INDONESIA
28573 2138 2084 NET Servicos de Comunicao S.A
10620 2146 1926 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1911 1784 PaeTec Communications, Inc.
22773 1886 1757 Cox Communications, Inc.
8402 1717 1701 Corbina telecom
7545 1758 1671 TPG Internet Pty Ltd
4766 2948 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
5.230.0.0/19 12586 GHOSTnet
5.230.32.0/19 12586 GHOSTnet
5.230.64.0/19 12586 GHOSTnet
5.230.96.0/19 12586 GHOSTnet
5.230.128.0/19 12586 GHOSTnet
5.230.160.0/19 12586 GHOSTnet
5.230.192.0/19 12586 GHOSTnet
5.248.0.0/16 15895 Kyivstar GSM
14.192.0.0/22 45464 Room 201, TGU Bldg

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 /14:845 /15:1543 /16:12389 /17:6429 /18:10846
/19:21073 /20:30247 /21:32118 /22:42312 /23:39873 /24:223761
/25:1402 /26:1660 /27:921 /28:172 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2641 3153 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1851 3331 bellsouth.net, inc.
8402 1439 1717 Corbina telecom
30036 1329 1394 Mediacom Communications Corp
22773 1227 1886 Cox Communications, Inc.
15557 1168 1224 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1535 AVANTEL, S.A.
1785 1012 1911 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 2:788 3:1 4:13 5:442 6:3
8:455 12:2001 13:1 14:666 15:11 16:3
17:6 20:27 23:203 24:1786 27:1334 31:1007
32:56 33:2 34:2 36:7 37:756 38:826
39:2 40:133 41:3118 42:158 44:3 46:1566
47:2 49:478 50:595 52:13 54:18 55:8
56:1 57:31 58:988 59:531 60:242 61:1292
62:947 63:2001 64:4265 65:2240 66:4501 67:2041
68:1170 69:3203 70:984 71:509 72:1869 74:2584
75:483 76:315 77:946 78:953 79:486 80:1265
81:956 82:626 83:533 84:625 85:1157 86:811
87:924 88:361 89:1805 90:303 91:5197 92:579
93:1539 94:1618 95:1270 96:416 97:319 98:1080
99:39 100:23 101:261 103:1527 105:512 106:119
107:198 108:454 109:1932 110:792 111:966 112:450
113:712 114:649 115:839 116:892 117:728 118:943
119:1263 120:306 121:688 122:1646 123:1173 124:1347
125:1280 128:549 129:184 130:282 131:633 132:311
133:22 134:250 135:61 136:217 137:238 138:342
139:171 140:501 141:280 142:487 143:374 144:497
145:80 146:519 147:262 148:758 149:324 150:157
151:173 152:451 153:183 154:20 155:418 156:222
157:381 158:185 159:648 160:343 161:413 162:358
163:190 164:693 165:419 166:528 167:547 168:960
169:125 170:906 171:150 172:7 173:1685 174:630
175:422 176:575 177:1139 178:1656 180:1358 181:136
182:1052 183:292 184:603 186:2228 187:1227 188:1526
189:1572 190:6102 192:6031 193:5724 194:4557 195:3451
196:1211 197:218 198:3780 199:4983 200:5989 201:1969
202:8723 203:8716 204:4430 205:2547 206:2772 207:2874
208:4067 209:3663 210:2832 211:1540 212:2034 213:1813
214:892 215:87 216:5130 217:1548 218:549 219:316
220:1238 221:534 222:334 223:386

End of report
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