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Exchange · Utah

(435) 280-xxxx

Every number from 435-280-0000 to 435-280-9999. NANPA records the exchange as assigned to Onvoy (Sinch) for Utah in 2019. Robocall and scam operations often use many numbers from one exchange, so if one number here is a shady call, its neighbors deserve a second look.

CarrierOnvoy (Sinch)original
Line typeVoIP / internet phonelikely
Rate centerUtah
Flagged numbers1

Reported numbers starting 435-280

NumberVerdictWhat it isReportsComplaints
(435) 280-4011CautionRobocall / recorded message012

About the 435-280 exchange

435-280 is an exchange (the first six digits of a phone number) in area code 435, which covers Utah. NANPA, which runs the North American Numbering Plan, assigned it to Onvoy (Sinch) for the Utah rate center in 2019. Numbers from this carrier are usually VoIP / internet phone lines.

People keep their number when they move or switch carrier, so this is where the number was first assigned, not where the caller is today. Local time for 435-280 numbers is usually Mountain time. Scammers can also fake (spoof) any number, so a call that shows a 435-280 number may not come from Onvoy (Sinch) at all.

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