[VoiceOps] Strange inbound Calls

[Nick Olsen]

We've been seeing these as well. About one call a day. Sometimes as many has 3 or 4.

Nick Olsen
 Network Operations 
(855) FLSPEED  x106

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From: "Jared Geiger" <jared at compuwizz.net>
Sent: Tuesday, January 14, 2014 8:55 PM
To: "voiceops at voiceops.org" <voiceops at voiceops.org>
Subject: Re: [VoiceOps] Strange inbound Calls

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

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 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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