NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

ESTACADA prefixes in area code 503

NANPA records 4 assigned NXX blocks to rate center ESTACADA in area code 503, 0.5% of the 784 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 1 holder holds those blocks, the largest being CASCADE UTILITIES, INC. (4). The same rate center name also appears in area code 971 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 503
1 holders of record
0 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
503-337 CASCADE UTILITIES, INC. – no yes
503-630 CASCADE UTILITIES, INC. – no yes
503-637 CASCADE UTILITIES, INC. – no yes
503-834 CASCADE UTILITIES, INC. – no yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Frequently asked

Which prefixes belong to ESTACADA in area code 503?

4 blocks: 337, 630, 637, 834. The table above gives the holder of each.

Which carriers have numbers in ESTACADA?

CASCADE UTILITIES, INC. (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ESTACADA a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 503

All 784 prefixes in 503