Gresham, OR — rate center
- State
- Oregon
- Active prefixes
- 31
- Carriers
- 13
- Pooled prefixes
- 22
- LATA
- 672
- Metro area
- Portland-Vancouver-Hillsboro, OR-WA MSA
The Gresham rate center (Oregon) anchors 31 active prefixes under area codes 503, 971. Rate centers, not city limits, are what phone numbers are legally tied to.
31 central-office prefixes are currently anchored to this rate center across 13 carriers. 22 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area. Routing-wise it sits in LATA 672.
Multiple area codes over one rate center (503/971) is the overlay pattern: same geography, different first three digits.
Treat this data as geography of the number, not of the caller: porting, VoIP and caller-ID spoofing all detach the two. When a call matters, hang up and call back through an official number.
Prefixes anchored to Gresham
| Prefix | Code holder | Pooled |
|---|---|---|
| 503-328 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Yes |
| 503-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 503-465 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | Yes |
| 503-489 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Yes |
| 503-491 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-492 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-512 | LEVEL 3 TELECOM OF OREGON, LLC - OR | Yes |
| 503-573 | LEVEL 3 COMMUNICATIONS, LLC - OR | Yes |
| 503-618 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-660 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | Yes |
| 503-661 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-663 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | Yes |
| 503-665 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-666 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-667 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-669 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-674 | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | No |
| 503-676 | TELEPORT COMMUNICATIONS AMERICA, LLC - OR | Yes |
| 503-766 | TELEPORT COMMUNICATIONS AMERICA, LLC - OR | Yes |
| 503-907 | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Yes |
| 503-912 | COMCAST IP PHONE, LLC | Yes |
FAQ
What area code is Gresham, OR?
Gresham is served by 2 area codes — 503, 971 — which overlay the same territory.
How many prefixes does Gresham have?
31 active NXX prefixes are anchored to this rate center in NANPA records, held by 13 carriers.
Is a call from a Gresham prefix really from Gresham?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.