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 484
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 |
|---|---|---|---|---|---|---|---|
| 2020-11-30 | 484-763-1XXX | 1000–1999 | Assigned | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
| 2011-11-28 | 484-626-9XXX | 9000–9999 | Assigned | CTSI, INC. - PA | 7513 | BETHLEHEM | PA |
| 2010-06-25 | 484-258-7XXX | 7000–7999 | Assigned | CTSI, INC. - PA | 7513 | READING | PA |
| 2009-09-22 | 484-374-4XXX | 4000–4999 | Assigned | CTSI, INC. - PA | 7513 | POTTSTOWN | PA |
| 2007-10-01 | 484-661-4XXX | 4000–4999 | Assigned | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
| 2007-05-14 | 484-464-6XXX | 6000–6999 | Assigned | CTSI, INC. - PA | 7513 | LEHIGHTON | PA |
| 2006-10-03 | 484-228-5XXX | 5000–5999 | Assigned | CTSI, INC. - PA | 7513 | GLENMOORE | PA |
| 2006-10-03 | 484-252-5XXX | 5000–5999 | Assigned | CTSI, INC. - PA | 7513 | EXTON | PA |
| 2006-10-03 | 484-391-7XXX | 7000–7999 | Assigned | CTSI, INC. - PA | 7513 | PHPHSBZN29 | PA |
| 2006-10-03 | 484-575-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | FLEETWOOD | PA |
| 2006-10-03 | 484-641-4XXX | 4000–4999 | Assigned | CTSI, INC. - PA | 7513 | KUTZTOWN | PA |
| 2006-10-03 | 484-660-5XXX | 5000–5999 | Assigned | CTSI, INC. - PA | 7513 | HAMBURG | PA |
| 2006-10-03 | 484-857-5XXX | 5000–5999 | Assigned | CTSI, INC. - PA | 7513 | KEMPTON | PA |
| 2006-09-08 | 484-263-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | SLATINGTON | PA |
| 2006-09-08 | 484-275-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | NORTHAMPTN | PA |
| 2006-09-08 | 484-519-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | EMMAUS | PA |
| 2006-09-08 | 484-601-8XXX | 8000–8999 | Assigned | CTSI, INC. - PA | 7513 | NEWTRIPOLI | PA |
| 2006-09-08 | 484-647-8XXX | 8000–8999 | Assigned | CTSI, INC. - PA | 7513 | NEWSMITHVL | PA |
| 2006-09-08 | 484-853-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | HELLERTOWN | PA |
| 2006-06-28 | 484-281-7XXX | 7000–7999 | Assigned | CTSI, INC. - PA | 7513 | BATH | PA |
| 2005-06-14 | 484-246-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | CATASAUQUA | PA |
| 2005-06-14 | 484-373-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | EASTON | PA |
| 2005-03-29 | 484-664-2XXX | 2000–2999 | Assigned | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
| 2004-06-22 | 484-895-4XXX | 4000–4999 | Assigned | CTSI, INC. - PA | 7513 | BETHLEHEM | PA |
| 2003-02-13 | 484-788-0XXX | 0000–0999 | Assigned | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
| 2003-01-06 | 484-895-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | BETHLEHEM | PA |
| 2002-12-26 | 484-664-7XXX | 7000–7999 | Assigned | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
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.