Oregon area codes
Oregon uses 4 area codes. The oldest is 503, in service since 1947; the newest is 458, from 2010. Across them 2,236 of 3,144 possible number blocks are allocated, 71.1% of capacity. 503 and 541 are at or past 95%, which is why new numbers there come from overlays rather than the original code. Lumen holds 28.7% of the 2,236 assigned blocks across the state, ahead of AT&T at 11.2%; a further 11.9% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named an Oregon caller ID 1,611 times – 0.7% of all complaints in the window, most often 971 with 563 (189th of 422 nationally). The state spans 2 time zones (Mountain and Pacific); 458 and 541 cross a zone boundary alone. NANPA records 416 rate centers across the state's codes, and local calls take all ten digits.
All 4 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 458 | 2010 | 225/786 | Other CLEC / VoIP 28.4% | 205 | 541 |
| 503 | 1947 | 784/786 | Lumen 37.2% | 399 | 971 |
| 541 | 1995 | 783/786 | Lumen 38.7% | 444 | 458 |
| 971 | 2000 | 444/786 | T-Mobile 16% | 563 | 503 |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.
How full Oregon’s codes are
A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Full or nearly full
Who holds the number blocks
Counted from every assigned block in the state: 2,236 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.
| Holder | Blocks | Share of Oregon | Largest in |
|---|---|---|---|
| Lumen | 641 | 28.7% | 2 codes |
| Other CLEC / VoIP | 267 | 11.9% | 1 code |
| AT&T | 251 | 11.2% | – |
| Verizon | 241 | 10.8% | – |
| T-Mobile | 221 | 9.9% | 1 code |
| Onvoy | 189 | 8.5% | – |
| Ziply Fiber | 156 | 7% | – |
| Allstream | 86 | 3.8% | – |
| Bandwidth | 71 | 3.2% | – |
| Charter | 35 | 1.6% | – |
| Spok | 23 | 1% | – |
| Comcast | 19 | 0.8% | – |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming Oregon codes
FTC Do Not Call complaints where the caller ID shown was a Oregon number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
How Oregon got its codes
1 in the 1940s, 1 in the 1990s, 1 in the 2000s, 1 in the 2010s. Each code after the first was split off from or overlaid on one already in service.
- 1947 503 goes into service.
- 1995 541 goes into service, split from or overlaid on 503.
- 2000 971 goes into service, split from or overlaid on 503.
- 2010 458 goes into service, split from or overlaid on 541.
Time zones
Oregon is in Mountain, Pacific time. 458, 541 cover more than one zone within a single area code, so the code alone does not tell you what time it is there. This code spans 2 time zones.
Frequently asked about Oregon area codes
How many area codes does Oregon have?
4 in service. They are 458, 503, 541 and 971.
What is the oldest area code in Oregon?
503, in service since 1947. Every later code in the state was split off from or overlaid on an existing one.
What is the newest area code in Oregon?
458, from 2010, overlaying 541.
Is Oregon running out of numbers?
503 and 541 are at or past 95% of capacity, but NANPA has not opened relief planning for them, so no new code is announced.
What time zone is Oregon in?
It spans 2: Mountain and Pacific. 458 and 541 cover more than one zone within a single area code, so the code alone does not tell you the time.
Which Oregon area code gets the most spam complaints?
971 – 563 FTC complaints in the 33 days to 30 October 2026, 189th of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most Oregon numbers?
Lumen, with 28.7% of the 2,236 blocks assigned across Oregon, ahead of Other CLEC / VoIP at 11.9%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in Oregon?
Yes. Every code in the state is in an overlay or ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.