Knappa, OR — rate center
The Knappa rate center (Oregon) anchors 3 active prefixes under area codes 503, 971. Rate centers, not city limits, are what phone numbers are legally tied to.
The rate center currently carries 3 working prefixes across 2 carriers. 2 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
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.
With only 3 prefixes, Knappa sits at the small end of Oregon's rate centers — a handful of carrier blocks cover the whole locality, and a number from here is a fairly strong locality signal (before porting is considered).
A Knappa prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Knappa
| Prefix | Code holder | Pooled |
|---|---|---|
| 503-386 | ONVOY, LLC - OR | Yes |
| 503-458 | CENTURYTEL OF OREGON, INC. DBA CENTURYLINK | No |
FAQ
What area code is Knappa, OR?
Knappa is served by 2 area codes — 503, 971 — which overlay the same territory.
How many prefixes does Knappa have?
3 active NXX prefixes are anchored to this rate center in NANPA records, held by 2 carriers.
Is a call from a Knappa prefix really from Knappa?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.