- City / exchange
- Sierravist
- Province / state
- Arizona
- Country
- United States
- Carrier
- T-mobile Usa, Inc.
- Line type
- Likely mobile
- OCN
- 6529
- Status
- In Service
- Assigned
- 04/02/2021
- Number pooling
- Yes (block shared between carriers)
520-504 phone numbers
Sierravist, Arizona, United States · T-mobile Usa, Inc.
Reported numbers in 520-504
No numbers in this block have been reported by visitors yet.
Complaints filed with the FCC
- 520-504-49031 complaint · 2026-10-06
What does the 520-504 prefix tell you?
Every North American number is area code + prefix + line. The prefix 520-504 was assigned to T-mobile Usa, Inc. on 04/02/2021 for the Sierravist exchange. A call from this block usually originates from a T-mobile Usa, Inc. customer in or near Sierravist, but caller ID can be spoofed to show any number.
Other Sierravist prefixes in 520
520-220520-224520-226520-227520-234520-236520-249520-255520-263520-266520-267520-335520-376520-378520-417520-439520-452520-454520-456520-458520-459520-473520-508520-515520-523520-533520-538520-556520-559520-654520-669520-671520-672520-673520-674520-678520-684520-685520-687520-691520-692520-693520-699520-706520-707520-708520-713520-714520-715520-716520-717520-718520-725520-732520-735520-737520-803520-843520-851520-852