The DNS Sleuth

An online tool for checking of DNS zones

Sleuth version 1.4.4 (21-05-08)

Written by Martin Mares <mj@ucw.cz>

Check results for basf.com

Starting zone checks for basf.com
Checking zone name
Resolving name-server address 

    -> ns.basf-ag.de.	29031	IN	A	141.6.2.20
Checking existence of zone 
    -> basf.com.	86400	IN	SOA	ns2.basf-ag.de. domains.basf.com. (
					2383	; Serial
					1700	; Refresh
					900	; Retry
					1209600	; Expire
					600 )	; Minimum TTL
Checking NS records 
    -> basf.com.	86400	IN	NS	basfegw2.basf-corp.com.
    -> basf.com.	86400	IN	NS	basfegw.basf-corp.com.
    -> basf.com.	86400	IN	NS	ns.basf-ag.de.
    -> basf.com.	86400	IN	NS	ns2.basf-ag.de.
Checking nameserver authority and synchronization 
    -> ns.basf-ag.de.	29031	IN	A	141.6.2.20
    -> 20.2.6.141.in-addr.arpa.	86400	IN	PTR	ns.basf-ag.de.
Probing name server ns.basf-ag.de (141.6.2.20) 
    -> basf.com.	86400	IN	SOA	ns2.basf-ag.de. domains.basf.com. (
					2383	; Serial
					1700	; Refresh
					900	; Retry
					1209600	; Expire
					600 )	; Minimum TTL
    -> basf.com.	86400	IN	NS	basfegw2.basf-corp.com.
    -> basf.com.	86400	IN	NS	basfegw.basf-corp.com.
    -> basf.com.	86400	IN	NS	ns.basf-ag.de.
    -> basf.com.	86400	IN	NS	ns2.basf-ag.de.
    -> ns2.basf-ag.de.	86400	IN	A	141.6.8.20
    -> 20.8.6.141.in-addr.arpa.	86400	IN	PTR	ns2.basf-ag.de.
Probing name server ns2.basf-ag.de (141.6.8.20) 
    -> basf.com.	86400	IN	SOA	ns2.basf-ag.de. domains.basf.com. (
					2383	; Serial
					1700	; Refresh
					900	; Retry
					1209600	; Expire
					600 )	; Minimum TTL
    -> basf.com.	86400	IN	NS	basfegw2.basf-corp.com.
    -> basf.com.	86400	IN	NS	basfegw.basf-corp.com.
    -> basf.com.	86400	IN	NS	ns.basf-ag.de.
    -> basf.com.	86400	IN	NS	ns2.basf-ag.de.
    -> basfegw2.basf-corp.com.	3600	IN	A	144.29.129.2
    -> 2.129.29.144.in-addr.arpa.	14400	IN	PTR	basfegw2.basf-corp.com.
Probing name server basfegw2.basf-corp.com (144.29.129.2) 
    -> basf.com.	86400	IN	SOA	ns2.basf-ag.de. domains.basf.com. (
					2383	; Serial
					1700	; Refresh
					900	; Retry
					1209600	; Expire
					600 )	; Minimum TTL
    -> basf.com.	86400	IN	NS	basfegw2.basf-corp.com.
    -> basf.com.	86400	IN	NS	basfegw.basf-corp.com.
    -> basf.com.	86400	IN	NS	ns.basf-ag.de.
    -> basf.com.	86400	IN	NS	ns2.basf-ag.de.
    -> basfegw.basf-corp.com.	3600	IN	A	144.29.1.2
    -> 2.1.29.144.in-addr.arpa.	14400	IN	PTR	basfegw.basf-corp.com.
Probing name server basfegw.basf-corp.com (144.29.1.2) 
    -> basf.com.	86400	IN	SOA	ns2.basf-ag.de. domains.basf.com. (
					2383	; Serial
					1700	; Refresh
					900	; Retry
					1209600	; Expire
					600 )	; Minimum TTL
    -> basf.com.	86400	IN	NS	basfegw2.basf-corp.com.
    -> basf.com.	86400	IN	NS	basfegw.basf-corp.com.
    -> basf.com.	86400	IN	NS	ns.basf-ag.de.
    -> basf.com.	86400	IN	NS	ns2.basf-ag.de.
Decided to use ns.basf-ag.de (141.6.2.20) for zone check
Checking whether ns.basf-ag.de knows an A record for its own name 
    -> ns.basf-ag.de.	29031	IN	A	141.6.2.20
Checking whether ns.basf-ag.de is able to reverse-map its own IP address
Checking connectivity with other nameservers
### Error: Unable to resolve www.ucw.cz: REFUSED
### Warning: ns.basf-ag.de is unable to resolve www.ucw.cz (maybe it's non-recursive)
### Error: Unable to resolve atrey.karlin.mff.cuni.cz: REFUSED
### Warning: ns.basf-ag.de is unable to resolve atrey.karlin.mff.cuni.cz (maybe it's non-recursive)
### Error: Unable to resolve www.google.com: REFUSED
### Warning: ns.basf-ag.de is unable to resolve www.google.com (maybe it's non-recursive)
Checking mapping of localhost
### Error: Unable to resolve localhost: REFUSED
### Warning: ns.basf-ag.de is unable to resolve localhost  [see RFC1912:4.1 for details] 
    -> 1.0.0.127.in-addr.arpa.	86400	IN	PTR	localhost.
Fetching zone data for basf.com
### Error: Zone transfer failed
### Fatal error: No name server available for checking

New query
Domain: Verbose output:
Server name: Server IP:

Please send your bug reports and suggestions to Martin Mares.