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Checking DNS SRV for SIP trunking or HPBX

Checking a DNS SRV record

CallTower SIP trunks and HPBX phones typically use DNS SRV records to reach the service platforms.  These are treated differently than a normal DNS A record.  You cannot ping an SRV record.  Below are the steps to test the 7006581001.siptrunking.appiaservices.com record on a Windows machine.

  1. Open a command prompt.
  2. Type in nslookup and hit Enter.
  3. Type set type=all and hit Enter.
  4. Type in _sip._udp.7006581001.siptrunking.appiaservices.com and hit Enter.
  5. If the record is built correctly, you should see results like below.  SRV records resolve to one or more A records.  These A records, along with associated IP addresses are shown in bold italics below.

> set type=all
> _sip._udp.7006581001.siptrunking.appiaservices.com.
Server:  slimer.isphone.net
Address:  69.54.70.15

_sip._udp.7006581001.siptrunking.appiaservices.com      SRV service location:
          priority       = 20
          weight         = 50
          port           = 5060
          svr hostname   = 7006581001.siptrunking2.appiaservices.com
_sip._udp.7006581001.siptrunking.appiaservices.com      SRV service location:
          priority       = 10
          weight         = 50
          port           = 5060
          svr hostname   = 7006581001.siptrunking1.appiaservices.com
siptrunking.appiaservices.com   nameserver = ns2.appiaservices.com
siptrunking.appiaservices.com   nameserver = ns3.appiaservices.com
siptrunking.appiaservices.com   nameserver = ns4.appiaservices.com
7006581001.siptrunking1.appiaservices.com       internet address = 205.196.170.135
7006581001.siptrunking2.appiaservices.com       internet address = 205.196.171.135

ns2.appiaservices.com   internet address = 69.54.70.15
ns3.appiaservices.com   internet address = 69.54.75.28
ns4.appiaservices.com   internet address = 206.80.64.251

 

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