[VoiceOps] Strange inbound Calls

[Jared Geiger]

We have started to see something similar now. Except it is 2 minute long
empty voicemails with return DIDs that route to nowhere.

~Jared


On Thu, Oct 3, 2013 at 7:43 AM, Matthew Crocker <matthew at corp.crocker.com>wrote:

>
> Automated system trying to probe for auto-attendant and/or voicemail holes?
>
> --
> Matthew S. Crocker
> President
> Crocker Communications, Inc.
> PO BOX 710
> Greenfield, MA 01302-0710
>
> E: matthew at crocker.com
> P: (413) 746-2760
> F: (413) 746-3704
> W: http://www.crocker.com
>
>
>
> On Oct 2, 2013, at 10:31 PM, Brandon Lehmann <brandon at bitradius.com>
> wrote:
>
> I’ll have to dig into our logs a bit closer. We’ve been seeing a bunch of
> 1s voicemails appear from random calling numbers to one of our TFs the last
> few months. I attributed it to listing the # on our ARIN and RADB entries
> for our ASN but haven’t had time to find the correlation.
>
>
>
> *From:* VoiceOps [mailto:voiceops-bounces at voiceops.org] *On Behalf Of *Nick
> Olsen
> *Sent:* Wednesday, October 02, 2013 2:54 PM
> *To:* Jay Hennigan
> *Cc:* voiceops at voiceops.org
> *Subject:* Re: [VoiceOps] Strange inbound Calls
>
> If the call is answered by a human, They hear nothing on the other side. I
> will ask our receptionist to allow the call to continue for a minute or so
> and see if it hangs up at the 60 second mark.
>
>
> Timing our own IVR. It takes exactly 60 seconds, If you press nothing to
> get all the way 1 second in to voicemail. As these calls always appear
> leaving 1 second voicemails.
> Nick Olsen
> Network Operations
> (855) FLSPEED  x106
>
> <image001.jpg>
>
>
> ------------------------------
>
> *From*: "Jay Hennigan" <jay at west.net>
> *Sent*: Wednesday, October 02, 2013 2:25 PM
> *To*: voiceops at voiceops.org
> *Subject*: Re: [VoiceOps] Strange inbound Calls
>
> On 10/2/13 10:13 AM, Nick Olsen wrote:
> > Hello Everyone,
> >
> > We've been seeing a lot of strange inbound calls to our toll free
> > numbers recently. The only thing they have in common is the caller ID
> > text is always a city and a state. And the the call duration is 60
> > seconds on the dot..Every time.
>
> Are the calls answered by a human? If so, what do they hear? If not
> and it's an IVR, if you call and say nothing does the call drop in 60
> seconds?
>
> City and state are not uncommon for CNAM. Many CNAM providers will put
> the city and state of the rate center for the NPA-NXX if caller name
> isn't available.
>
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> Impulse Internet Service - http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
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