Just to follow up on this... Twilio doesn't expose the headers, so I have no way of knowing which carrier is allowing these spam calls to originate. Contacting Twilio and asking them to report it results in their techs asking for a detailed list of every zarking call SID and account SID, followed by "Sorry, those calls don't originate from Twilio". When pushed to contact the offending carrier on my behalf they say they don't store that information on their systems so they can't do anything, just block the prefix in your phone system.
I guess it's in Twilio's best interests to let the spammers keep calling as they get to nickle and dime me for each call. -A On Wed, Mar 18, 2026 at 8:22 AM Aaron C. de Bruyn <[email protected]> wrote: > A bunch of numbers out of Indiana have been spamming my customers for > about a week. > > Most are automated recordings about how your Google business listing is > wrong and needs to be fixed so customers can find you. Sometimes it's a > human prefixed by the telltale "BWOOP" sound. > > +14632000068 - BANDWIDTH.COM CLEC LLC IN > +14632001925 - BANDWIDTH.COM CLEC LLC IN > +14632004002 - BANDWIDTH.COM CLEC LLC IN > +14632005772 - BANDWIDTH.COM CLEC LLC IN > +14632006038 - BANDWIDTH.COM CLEC LLC IN > +14632006422 - BANDWIDTH.COM CLEC LLC IN > +14632006730 - BANDWIDTH.COM CLEC LLC IN > +14632009587 - BANDWIDTH.COM CLEC LLC IN > +14632018300 - BHN IP ENABLED SERVICES LLC > +14632018413 - BHN IP ENABLED SERVICES LLC > +14632018586 - BHN IP ENABLED SERVICES LLC > +14632018682 - BHN IP ENABLED SERVICES LLC > +14632027042 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027073 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027200 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027252 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027397 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027539 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027678 - LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632027899 -LEVEL 3 COMMUNICATIONS LLC IN (Lumen) > +14632030946 - METROPCS INC (T-Mobile US) > > Kinda hard to believe the big boys haven't caught this abuse of their > network yet. > > I tried reporting the numbers to bandwidth.com (as ID'd by telcodata.us), > but their form only allows for a single entry at a time, and it says most > of the numbers don't belong to them. Either their form is broken or > telcodata.us is out of date. > > I can't find a reporting for Level3/Lumen. They seem to be geared towards > "I'm a customer and need help figuring out the star code to block calls". > > -A >
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