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 6, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 07 Aug, 2012

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

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

BGP routing table entries examined: 421306
Prefixes after maximum aggregation: 177039
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 205022
Total ASes present in the Internet Routing Table: 41700
Prefixes per ASN: 10.10
Origin-only ASes present in the Internet Routing Table: 33398
Origin ASes announcing only one prefix: 15679
Transit ASes present in the Internet Routing Table: 5598
Transit-only ASes present in the Internet Routing Table: 132
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: 410
Unregistered ASNs in the Routing Table: 157
Number of 32-bit ASNs allocated by the RIRs: 3075
Number of 32-bit ASNs visible in the Routing Table: 2704
Prefixes from 32-bit ASNs in the Routing Table: 6950
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 155
Number of addresses announced to Internet: 2572632716
Equivalent to 153 /8s, 87 /16s and 66 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 148198

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

Prefixes being announced by APNIC Region ASes: 101947
Total APNIC prefixes after maximum aggregation: 32765
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102463
Unique aggregates announced from the APNIC address blocks: 42105
APNIC Region origin ASes present in the Internet Routing Table: 4731
APNIC Prefixes per ASN: 21.66
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 759
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: 275
Number of APNIC addresses announced to Internet: 706687872
Equivalent to 42 /8s, 31 /16s and 51 /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: 153447
Total ARIN prefixes after maximum aggregation: 77790
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 154499
Unique aggregates announced from the ARIN address blocks: 68917
ARIN Region origin ASes present in the Internet Routing Table: 15190
ARIN Prefixes per ASN: 10.17
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1596
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: 16
Number of ARIN addresses announced to Internet: 1073053312
Equivalent to 63 /8s, 245 /16s and 126 /24s
Percentage of available ARIN address space announced: 56.8

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: 106276
Total RIPE prefixes after maximum aggregation: 55855
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 108446
Unique aggregates announced from the RIPE address blocks: 68595
RIPE Region origin ASes present in the Internet Routing Table: 16734
RIPE Prefixes per ASN: 6.48
RIPE Region origin ASes announcing only one prefix: 8099
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: 1761
Number of RIPE addresses announced to Internet: 638230500
Equivalent to 38 /8s, 10 /16s and 159 /24s
Percentage of available RIPE address space announced: 92.8

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: 42910
Total LACNIC prefixes after maximum aggregation: 8380
LACNIC Deaggregation factor: 5.12
Prefixes being announced from the LACNIC address blocks: 45671
Unique aggregates announced from the LACNIC address blocks: 21837
LACNIC Region origin ASes present in the Internet Routing Table: 1620
LACNIC Prefixes per ASN: 28.19
LACNIC Region origin ASes announcing only one prefix: 423
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: 646
Number of LACNIC addresses announced to Internet: 112802216
Equivalent to 6 /8s, 185 /16s and 57 /24s
Percentage of available LACNIC address space announced: 67.2

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: 9621
Total AfriNIC prefixes after maximum aggregation: 2195
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 10072
Unique aggregates announced from the AfriNIC address blocks: 3434
AfriNIC Region origin ASes present in the Internet Routing Table: 556
AfriNIC Prefixes per ASN: 18.12
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 125
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: 41570048
Equivalent to 2 /8s, 122 /16s and 79 /24s
Percentage of available AfriNIC address space announced: 41.3

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 2759 11123 1252 Korea Telecom (KIX)
17974 2293 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1706 301 88 TPG Internet Pty Ltd
4755 1605 386 158 TATA Communications formerly
9829 1310 1084 31 BSNL National Internet Backbo
9583 1203 90 533 Sify Limited
7552 1128 1062 11 Vietel Corporation
4808 1120 2050 320 CNCGROUP IP network: China169
24560 1035 385 163 Bharti Airtel Ltd., Telemedia
9498 998 294 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 3445 986 155 Windstream Communications Inc
6389 3343 3773 191 bellsouth.net, inc.
18566 2088 382 181 Covad Communications
1785 1945 681 131 PaeTec Communications, Inc.
22773 1699 2914 125 Cox Communications, Inc.
20115 1646 1572 611 Charter Communications
4323 1578 1027 385 Time Warner Telecom
30036 1434 281 786 Mediacom Communications Corp
7018 1248 10040 814 AT&T WorldNet Services
11492 1191 216 351 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 1611 544 16 Corbina telecom
15557 1215 2247 55 LDCOM NETWORKS
12479 823 761 88 Uni2 Autonomous System
34984 736 189 177 BILISIM TELEKOM
20940 724 236 564 Akamai Technologies European
6830 714 2310 445 UPC Distribution Services
31148 704 37 9 FreeNet ISP
2118 664 97 14 EUnet/RELCOM Autonomous Syste
13188 659 100 9 Educational Network
58113 627 70 373 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 2037 350 212 TVCABLE BOGOTA
28573 2030 1228 58 NET Servicos de Comunicao S.A
6503 1528 419 67 AVANTEL, S.A.
8151 1465 3042 345 UniNet S.A. de C.V.
7303 1462 936 200 Telecom Argentina Stet-France
6458 882 81 15 GUATEL
27947 717 74 95 Telconet S.A
11172 644 91 74 Servicios Alestra S.A de C.V
3816 597 253 99 Empresa Nacional de Telecomun
22047 583 326 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 965 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
36998 532 48 3 MOBITEL
6713 515 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 263 905 224 The Internet Solution
33776 215 12 19 Starcomms Nigeria Limited
12258 195 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 170 680 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 3445 986 155 Windstream Communications Inc
6389 3343 3773 191 bellsouth.net, inc.
4766 2759 11123 1252 Korea Telecom (KIX)
17974 2293 702 54 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
10620 2037 350 212 TVCABLE BOGOTA
28573 2030 1228 58 NET Servicos de Comunicao S.A
1785 1945 681 131 PaeTec Communications, Inc.
7545 1706 301 88 TPG Internet Pty Ltd
22773 1699 2914 125 Cox Communications, Inc.

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 3343 3152 bellsouth.net, inc.
17974 2293 2239 PT TELEKOMUNIKASI INDONESIA
28573 2030 1972 NET Servicos de Comunicao S.A
18566 2088 1907 Covad Communications
10620 2037 1825 TVCABLE BOGOTA
1785 1945 1814 PaeTec Communications, Inc.
7545 1706 1618 TPG Internet Pty Ltd
8402 1611 1595 Corbina telecom
22773 1699 1574 Cox Communications, Inc.
4766 2759 1507 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
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 5.149.67.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.71.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.74.0/23 35567 DASTO semtel d.o.o.
59458 UNALLOCATED 5.149.96.0/21 50597 ScopeSky Communicati
59458 UNALLOCATED 5.149.104.0/22 50597 ScopeSky Communicati

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 /9:12 /10:28 /11:82 /12:236
/13:474 /14:849 /15:1528 /16:12338 /17:6371 /18:10746
/19:20944 /20:29935 /21:31883 /22:41709 /23:39715 /24:220533
/25:1273 /26:1505 /27:854 /28:168 /29:62 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2804 3445 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1835 3343 bellsouth.net, inc.
30036 1369 1434 Mediacom Communications Corp
8402 1308 1611 Corbina telecom
15557 1159 1215 LDCOM NETWORKS
11492 1154 1191 Cable One
22773 1123 1699 Cox Communications, Inc.
1785 1052 1945 PaeTec Communications, Inc.
6503 1051 1528 AVANTEL, S.A.

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

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

1:557 2:748 3:1 4:13 5:334 6:3
8:437 12:2004 13:1 14:632 15:11 16:3
17:6 20:24 23:202 24:1801 27:1321 31:1025
32:56 33:2 34:2 36:8 37:687 38:825
39:1 40:133 41:2844 42:156 44:3 46:1556
47:2 49:426 50:578 52:13 54:14 55:7
56:1 57:31 58:987 59:513 60:236 61:1285
62:973 63:2025 64:4242 65:2244 66:4535 67:2037
68:1152 69:3206 70:987 71:520 72:1871 74:2607
75:489 76:331 77:945 78:953 79:497 80:1281
81:954 82:639 83:540 84:626 85:1148 86:794
87:933 88:352 89:1807 90:305 91:5071 92:590
93:1466 94:1575 95:1277 96:400 97:318 98:897
99:39 100:22 101:255 103:1342 105:512 106:112
107:189 108:414 109:1911 110:792 111:946 112:431
113:668 114:654 115:856 116:918 117:729 118:946
119:1229 120:363 121:697 122:1643 123:1160 124:1346
125:1264 128:555 129:183 130:267 131:639 132:298
133:22 134:245 135:61 136:216 137:240 138:346
139:183 140:494 141:261 142:450 143:371 144:501
145:76 146:510 147:283 148:771 149:319 150:153
151:186 152:455 153:175 154:19 155:404 156:222
157:381 158:188 159:631 160:348 161:400 162:385
163:189 164:675 165:411 166:577 167:533 168:964
169:126 170:907 171:147 172:5 173:1741 174:631
175:430 176:574 177:993 178:1672 180:1330 181:117
182:1029 183:233 184:572 186:2070 187:1112 188:1399
189:1589 190:6056 192:6024 193:5450 194:4202 195:3261
196:1239 197:200 198:3697 199:4948 200:6019 201:1986
202:8663 203:8675 204:4395 205:2533 206:2792 207:2835
208:4044 209:3633 210:2770 211:1550 212:2013 213:1812
214:855 215:86 216:5083 217:1558 218:561 219:314
220:1239 221:568 222:334 223:360

End of report
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