NumberResearchThousands-blocks in 973-552
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 973-552 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 973 blocks
Most active assignees, all time — NPA 973
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 |
|---|---|---|---|---|---|---|---|
| 2021-01-25 | 973-552-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTAGUE | NJ |
| 2026-02-18 | 973-552-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MONTAGUE | NJ |
| 2006-04-13 | 973-552-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | MONTAGUE | NJ |
| — | 973-552-3XXX | 3000–3999 | Available | MONTAGUE | NJ | ||
| 2005-01-28 | 973-552-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | MONTAGUE | NJ |
| 2018-09-10 | 973-552-5XXX | 5000–5999 | Assigned | BLUEBIRD COMMUNICATIONS, LLC - NJ | 999H | MONTAGUE | NJ |
| 2019-03-19 | 973-552-6XXX | 6000–6999 | Assigned | CORETEL NEW JERSEY, INC. - NJ | 482F | MONTAGUE | NJ |
| 2013-08-14 | 973-552-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MONTAGUE | NJ |
| 2008-11-05 | 973-552-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | MONTAGUE | NJ |
| 2011-11-17 | 973-552-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | MONTAGUE | NJ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.