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Exchange · Frederick, MD

(240) 840-xxxx

Every number from 240-840-0000 to 240-840-9999. NANPA records the exchange as assigned to Onvoy (Sinch) for Frederick, MD in 2018. 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 centerFrederick, MD
Flagged numbers1

Reported numbers starting 240-840

NumberVerdictWhat it isReportsComplaints
(240) 840-9810CautionTelemarketer / sales03

About the 240-840 exchange

240-840 is an exchange (the first six digits of a phone number) in area code 240, which covers Maryland. NANPA, which runs the North American Numbering Plan, assigned it to Onvoy (Sinch) for the Frederick, MD rate center in 2018. 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 240-840 numbers is usually Eastern time. Scammers can also fake (spoof) any number, so a call that shows a 240-840 number may not come from Onvoy (Sinch) at all.

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