Does a traceroute. Lookup and display the network or AS names and AS numbers.

lft -NAS google.com

From the man page. lft ? display the route packets take to a network host/socket using one of several layer-4 protocols and methods; optionally show heuristic network information in transitu -A Enable lookup and display of of AS (autonomous system) numbers (e.g., [1]). This option queries one of several whois servers (see options 'C' and 'r') in order to ascertain the origin ASN of the IP address in question. By default, LFT uses the pWhoIs service whose ASN data tends to be more accurate and more timely than using the RADB as it is derived from the Internet's global routing table. -N Enable lookup and display of network or AS names (e.g., [GNTY-NETBLK-4]). This option queries Prefix WhoIs, RIPE NCC, or the RADB (as requested). In the case of Prefix WhoIs or RADB, the network name is displayed. In the case of RIPE NCC, the AS name is displayed.

Sample Output

TTL LFT trace to bs-in-f104.1e100.net (64.233.163.104):80/tcp
 1  [AS?] [NULL] 10.1.1.1 0.2ms
 2  [18881] [NET-189-32-0-0-S11] gvt-l0.b9.cpe.gvt.net.br (189.59.84.1) 5.3ms
 3  [18881] [NET-189-32-0-0-S11] 189.59.89.217.static.host.gvt.net.br (189.59.89.217) 5.2ms
 4  [18881] [NET-189-32-0-0-S11] gvt-ge-3-1.rc1.bsa.gvt.net.br (189.59.250.21) 29.1ms
 5  [18881] [NET-189-32-0-0-S11] gvt-po-0-1-4-3-rc03.spo.gvt.net.br (189.59.248.161) 42.7ms
 6  [18881] [NET-189-32-0-0-S11] gvt-te-0-0-0-0-rt01.spo.gvt.net.br (189.59.249.1) 46.1ms
**  [neglected] no reply packets received from TTL 7
 8  [15169] [GOOGLE] 209.85.243.198 45.0ms
 9  [15169] [GOOGLE] 72.14.233.89 49.3ms
10  [15169] [GOOGLE] 64.233.175.58 45.6ms
**  [neglected] no reply packets received from TTLs 11 through 14
15  [15169] [GOOGLE] [target open] bs-in-f104.1e100.net (64.233.163.104):80 49.3ms

By: tulio

2011-04-04 03:07:00

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