Prefix 503-575 — Portland, OR
A phone number starting 503-575 was issued in the Portland rate center of OR — part of area code 503.
NANPA's central-office code records list MCIMETRO ACCESS TRANSMISSION SERVICES LLC (OCN 7229) as the code holder, assigned November 18, 2008. Because 503-575 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
A scammer can display 503-575 without ever touching OR. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.
Portland is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area. For routing purposes it sits in LATA 672. Numbers here keep Pacific time.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 503-572 | Portland | T-MOBILE USA, INC. |
| 503-573 | Gresham | LEVEL 3 COMMUNICATIONS, LLC - OR |
| 503-574 | Beaverton | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER |
| 503-576 | Salem | QWEST CORPORATION |
| 503-577 | Portland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR |
| 503-578 | Beaverton | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER |
FAQ
Where is 503-575 located?
The prefix is assigned to the Portland rate center in OR, area code 503. It is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area.
Which company owns 503-575 numbers?
MCIMETRO ACCESS TRANSMISSION SERVICES LLC holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 503-575 safe to answer?
The prefix itself says nothing about the caller. Legitimate Portland businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.