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Ringback issues when calling T-Mobile?
by hf0002+nanog＠uah.edu Nov. 2, 2021

Nov. 2, 2021

Is anyone else getting an eerie lack of ringback when originating toward T-Mobile? We get a 183 Session Progress with media, then a 180 Ringing a third of a second later. So the result is a 1/3 second long burst of ringback and then silence. We are seeing if we might be able to start locally generating ringback when we see the 180, but to be honest, that's just a weird sequence of messages and I would never expect to receive them in that order. So we didn't exactly plan for it. The relevant trunk is from Comcast, but I highly suspect they are just passing through what they got from T-Mobile (or whoever they route T-Mobile calls through). We are in the north Alabama area and we have heard of other customers with various carriers having similar issues. Just wondering if anyone had a technical reason/explanation or any more information. -- Hunter Fuller (they) Router Jockey VBH M-1A +1 256 824 5331 Office of Information Technology The University of Alabama in Huntsville Network Engineering

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Calls Not Reaching Us
by voiceops＠ics-il.net Oct. 28, 2021

Oct. 28, 2021

I have a customer saying that they are getting reports from their customers that they're getting "number is no longer in service" errors when calling them. I checked Metaswitch SAS for a number that experienced this issue and we don't see any inbound attempts from that number. The call would have come in via a traditional TDM connection to a tandem. I reached out to the Primary contacts in NPAC for the originating caller (Comcast). They told me to bugger off and to have the end user call support. Did I make the wrong move? ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

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old Neustar data
by robverk＠hotmail.com Oct. 27, 2021

Oct. 27, 2021

I am looking to see if someone in the group might have kept some old files. I am looking for the daily files Neustar generated. Numbers ported from wireline to mobile and mobile number ported to wireline. I believe Neustar generated the files daily when they were the administer for mobile porting before iconectiv

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Carriers Keeping Acquired Defunct Company Names
by beckman＠angryox.com Oct. 25, 2021

Oct. 25, 2021

I'm curious why companies like T-Mobile and Inteliquent/Onvoy/Voyant continue to retain company names and corporate entities long after their brands have been retired, acquired, and generally shell entities holding phone numbers. Some examples: T-Mobile -> Omnipoint, Aerial Communications, Suncom, Powertel, Sprint, Eliska Wireless Ventures Subsidiary I Sprint -> O1 Communications, US Telepacific AT&T -> New Cingular Wireless, Southwestern Bell, Pacific Bell, Bell South, Southern Bell, Ameritech Verizon -> Cellco Partnership, Bell Atlantic Nynex Mobile Inteliquent -> Radiant IQ, Onvoy, Voyant, Broadvox, Layered, Neutral Tandem CenturyLink -> United Telephone, Qwest Spectrum -> Charter Fiberlink So many of these brands are dead and acquired, yet these companies live on and own phone numbers. Cingular died in 2006. Radiant IQ acquired in 2015. Bell Atlantic went away in 2000 with Verizon acquiring Bell Atlantic and GTE. Why? What benefit does this provide the owning/operating companies? Legal insulation? Beckman PS -- This all started when I saw Inteliquent request VoIP Numbering for Radiant IQ in June 2020, a company they acquired in 2015, and generally does not exist in any meaningful way to customers or consumers, residential or business. This industry in the US is weird. --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com https://www.angryox.com/ ---------------------------------------------------------------------------

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Government Debit Cards used for Fraud?
by beckman＠angryox.com Oct. 21, 2021

Oct. 21, 2021

I've got an interesting situation popping up tonight. A new account was created, invalid email, no valid contact phone number. The name and address on the card tie back to a 62-year-old individual. The BIN for the credit card is linked to "Prepaid Debit Government" making me wonder if it was a debit card sent to individuals during the pandemic or Economic Impact Payments sent in May 2020. However, all I can find is that they were issued by Visa and not MasterCard, and this was a MasterCard. I did find that the GoDirect program for Social Security, VA, or other federal benefits issues a MasterCard debit card for regular payments rather than checks, so it could be that. Overall it seems unlikely for a 62-year-old to need phone services on the Internet, and highly likely that they might be receiving Social Security benefits. It's possible that someone got their hands on the debit card without authorization. Has anyone else seen strange new accounts paid for with Government Issued MasterCard Debit Cards? Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com https://www.angryox.com/ ---------------------------------------------------------------------------

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historical information on ported numbers?
by robverk＠hotmail.com Oct. 21, 2021

Oct. 21, 2021

I am hoping the group can help me out or point me in the right direction. I need to get historical information on ported numbers. If the number was ported to a mobile operator from a landline and if that number was ever ported back to a landline. I believe iconectiv now manages this but I would like to go back to when number porting stated for mobile within the US. I did find a handful of 3rd parties had this information, but I would like to license from the direct source if possible

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Broadworks Device Management Security
by dave＠socket.net Oct. 20, 2021

Oct. 20, 2021

All, I?m interested in what you?re doing to protect Broadworks device profile files. Unique credentials for access, IP whitelist, HTTPS, something else? Thanks, Dave Sill IT Director, Socket Telecom <https://www.socket.net/> 573-817-0000 ext 211

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Robocall Blocking using National Do Not Call Registry
by calvin.ellison＠voxox.com Oct. 19, 2021

Oct. 19, 2021

I've noticed in the SIP responses coming through our termination LCR a few that mention calls blocked due to DNIS listed on the Do Not Call Registry. I've also seen DNC blocking mentioned in other robocall blocking contexts. I understand the benefit in doing this, but I don't understand how carriers are able to use the DNC this way. Is there some exemption to the DNC rules that permit this use case? The rules as they are written on the DNC website indicate that I would need an active Subscriber Account Number from each of my clients in order to perform any kind of DNC filtering, with controls to ensure each client is only dipping the area codes they are paying for. Is using the DNC across an entire network for robocall blocking actually a misuse of the DNC? Calvin Ellison Systems Architect calvin.ellison at voxox.com +1 (213) 285-0555 <http://voxox.com> <https://www.facebook.com/VOXOX/> <https://www.instagram.com/voxoxofficial/> <https://www.linkedin.com/company/3573541/admin/> <https://twitter.com/Voxox> The information contained herein is confidential and privileged information or work product intended only for the individual or entity to whom it is addressed. Any unauthorized use, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately.

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National Do Not Call Registry"
by ryan.finnesey＠conovence.com Oct. 11, 2021

Oct. 11, 2021

I was wonder what others were doing to license the National Do Not Call Registry? It seems I cannot license the data set and give access to multiple customers? Ryan

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VoIP Provider DDoSes
by voiceops＠ics-il.net Oct. 8, 2021

Oct. 8, 2021

I sent this to NANOG recently, not even thinking that this list may get a better ROI. As many may know, a particular VoIP supplier is suffering a DDoS. https://twitter.com/voipms Are your garden variety DDoS mitigation platforms or services equipped to handle DDoSes of VoIP services? What nuances does one have to be cognizant of? A WAF doesn't mean much to SIP, IAX2, RTP, etc. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

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