IPtel

IPtel is a free SIP service sponsored by the SIP Express Router developers. It supports ZRTP but does not support secure SIP.

Network scan results

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lee@ikaruga:~$ dig SRV _sips._tcp.iptel.org

; <<>> DiG 9.7.3 <<>> SRV _sips._tcp.iptel.org
;; global options: +cmd
;; Got answer:
;; >>HEADER<< opcode: QUERY, status: NXDOMAIN, id: 2386
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;_sips._tcp.iptel.org. IN SRV

;; AUTHORITY SECTION:
iptel.org. 86384 IN SOA ns1.iptel.org. hostmaster.iptel.org. 1325497017 360 1800 604800 86400

lee@ikaruga:~$ nmap iptel.org

Starting Nmap 5.21 ( http://nmap.org ) at 2012-03-09 15:04 PST
Nmap scan report for iptel.org (217.9.36.145)
Host is up (0.20s latency).
rDNS record for 217.9.36.145: sip.iptel.org
Not shown: 992 filtered ports
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
443/tcp open https
5060/tcp open sip
5061/tcp closed sip-tls
5080/tcp closed unknown
5087/tcp closed unknown
9090/tcp open zeus-admin
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