[VoiceOps] Strange inbound Calls

Hiers, David David.Hiers at adp.com
Wed Oct 2 14:53:46 EDT 2013

Many carriers have "short call" language in their ICAs by which calls under a certain length are seen as signs of an auto-dialer, thus subject to different rules.  Your upstream carrier might have their own reasons to pursue this further.


From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Nick Olsen
Sent: Wednesday, October 02, 2013 11:44
To: Matt Yaklin
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] Strange inbound Calls

I did call a hand full of them to see if I got anywhere, But they either didn't route anywhere and sat dead till I hung up or came back as "can not be completed as dialed". I too saw that they were all Level3 numbers by the current LRN. Granted, Level3 sells service to tons of Over the top VOIP places like Vitelity..etc which allow you to provision a number via a web portal in seconds. That being said, There is no reason to assume the calling party actually has this TN and isn't just filling the Caller ID with random L3 numbers.

I too get a immediate hangup when calling 2564002365.

Nick Olsen
Network Operations
(855) FLSPEED  x106


From: "Matt Yaklin" <myaklin at g4.net<mailto:myaklin at g4.net>>
Sent: Wednesday, October 02, 2013 2:37 PM
To: "Nick Olsen" <nick at flhsi.com<mailto:nick at flhsi.com>>
Cc: voiceops at voiceops.org<mailto:voiceops at voiceops.org>
Subject: Re: [VoiceOps] Strange inbound Calls

I randomly choose a few numbers to check our CDR data and
I see that 2564002365 called a customer of ours normal TN
and one customer's toll free number.

> 9/27/2013 20:12:43,"ALBERTVILLE AL" <2564002365>,2564002365,8553577333,60,60,ANSWERED,Incoming

When I call the number 2564002365 it answers and immediately hangs up on
me. It reminds me of an asterisk like thing where I have made a mistake in
my config but this is intentional?

Randomly checking a few numbers they seem to belong to Level3 if they have
not ported.

Call them up and complain? Maybe in some wierd bizzaro world they might
actually do something about it.

matt at g4.net<mailto:matt at g4.net>

On Wed, 2 Oct 2013, 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.
> Considering they are calling toll free numbers I assume this is some kind of fraud attempt. IE. Calling tons of random Toll Free numbers so the terminating carrier pays the originator..etc.
> Anyone else seeing this? Anything we can do to stop these? Here's what our CDR looks like, These are just the calls to our Corp Toll free. But we are seeing them toward customer toll free as well.
> 9/1/2013 13:39:02,"CARLSBAD CA" <4423334358>,4423334358,8553577333,60,60,ANSWERED,Incoming
> 9/1/2013 16:20:30,"WEST BLOCTON AL" <2056368142>,2056368142,8553577333,60,60,ANSWERED,Incoming
> 9/6/2013 07:18:18,"HUNTNGTN PRK CA" <3232825216>,3232825216,8553577333,60,60,ANSWERED,Incoming
> 9/7/2013 11:54:09,"FORT SMITH AR" <4796682810>,4796682810,8553577333,60,60,ANSWERED,Incoming
> 9/7/2013 23:14:35,"TUCSON AZ" <5203326555>,5203326555,8553577333,60,60,ANSWERED,Incoming
> 9/9/2013 19:06:00,"WARRIOR AL" <2052891452>,2052891452,8553577333,60,60,ANSWERED,Incoming
> 9/9/2013 20:23:49,"SAN RAFAEL CA" <4155240522>,4155240522,8553577333,60,60,ANSWERED,Incoming
> 9/25/2013 17:01:09,"FRESNO CA" <5595499612>,5595499612,8553577333,60,60,ANSWERED,Incoming
> 9/25/2013 22:41:29,"MOBILE AL" <2515454388>,2515454388,8553577333,60,60,ANSWERED,Incoming
> 9/26/2013 00:01:35,"PINSON AL" <2056834147>,2056834147,8553577333,60,60,ANSWERED,Incoming
> 9/26/2013 03:13:53,"PHENIX CITY AL" <3344685267>,3344685267,8553577333,60,60,ANSWERED,Incoming
> 9/26/2013 22:38:21,"GUNTERSVILLE AL" <2562934038>,2562934038,8553577333,60,60,ANSWERED,Incoming
> 9/27/2013 11:29:58,"MIAMI AZ" <9284731203>,9284731203,8553577333,60,60,ANSWERED,Incoming
> 9/27/2013 20:12:43,"ALBERTVILLE AL" <2564002365>,2564002365,8553577333,60,60,ANSWERED,Incoming
> 9/30/2013 02:07:15,"HUNTSVILLE AL" <2562174709>,2562174709,8553577333,60,60,ANSWERED,Incoming
> 9/30/2013 06:55:16,"CHASE CITY VA" <4345334010>,4345334010,8553577333,60,60,ANSWERED,Incoming
> 10/2/2013 02:23:12,"LOS ANGELES CA" <2134555680>,2134555680,8553577333,60,60,ANSWERED,Incoming
> Nick Olsen
> Network Operations (855) FLSPEED  x106
> [emaillogo.jpg]

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