NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 503
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-03-07 | 503-609-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CORBETT | OR |
| 2024-06-21 | 503-600-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | MOLALLA | OR |
| 2023-12-14 | 503-996-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | MOUNTANGEL | OR |
| 2023-02-10 | 503-879-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRANDRONDE | OR |
| 2021-06-03 | 503-783-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | STFRD-SNDY | OR |
| 2020-08-26 | 503-344-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2020-04-15 | 503-922-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2019-05-06 | 503-852-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CARLTON | OR |
| 2019-04-04 | 503-664-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVER | OR |
| 2013-12-12 | 503-664-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVER | OR |
| 2013-08-28 | 503-444-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2013-08-28 | 503-444-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2013-07-23 | 503-354-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | TILLAMOOK | OR |
| 2012-11-28 | 503-862-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SHERWOOD | OR |
| 2012-10-23 | 503-683-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2012-08-01 | 503-836-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | ASTORIA | OR |
| 2012-03-15 | 503-305-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2012-01-19 | 503-728-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLATSKANIE | OR |
| 2011-12-29 | 503-405-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRESHAM | OR |
| 2011-10-20 | 503-406-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2011-10-13 | 503-925-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SHERWOOD | OR |
| 2011-07-20 | 503-573-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRESHAM | OR |
| 2011-07-06 | 503-451-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2011-03-08 | 503-822-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SHERWOOD | OR |
| 2011-03-03 | 503-406-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2011-03-03 | 503-766-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRESHAM | OR |
| 2011-02-24 | 503-410-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | ST HELENS | OR |
| 2011-02-24 | 503-427-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | STFRD-SNDY | OR |
| 2010-12-30 | 503-406-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2010-12-14 | 503-512-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRESHAM | OR |
| 2010-11-16 | 503-406-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2010-10-29 | 503-967-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2010-08-25 | 503-894-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2010-07-23 | 503-406-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2010-05-20 | 503-828-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVERTON | OR |
| 2010-04-15 | 503-967-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2010-03-05 | 503-828-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVERTON | OR |
| 2010-01-29 | 503-208-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2010-01-29 | 503-208-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-11-12 | 503-877-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2009-08-13 | 503-505-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-08-13 | 503-505-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-08-13 | 503-505-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-08-05 | 503-278-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-06-19 | 503-278-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-04-15 | 503-575-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2009-03-09 | 503-897-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | MILL CITY | OR |
| 2008-11-05 | 503-208-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-11-05 | 503-926-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-11-05 | 503-926-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.