NumberResearchThousands-blocks in 973-544
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 973-544 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-03-12 | 973-544-0XXX | 0000–0999 | Assigned | MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ | 3639 | MILLBURN | NJ |
| 2005-10-21 | 973-544-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILLBURN | NJ |
| 2018-09-10 | 973-544-2XXX | 2000–2999 | Assigned | BLUEBIRD COMMUNICATIONS, LLC - NJ | 999H | MILLBURN | NJ |
| 2022-01-14 | 973-544-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILLBURN | NJ |
| 2021-11-09 | 973-544-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILLBURN | NJ |
| 2019-12-16 | 973-544-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | MILLBURN | NJ |
| 2003-09-26 | 973-544-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | MILLBURN | NJ |
| 2014-05-21 | 973-544-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MILLBURN | NJ |
| 2008-11-05 | 973-544-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | MILLBURN | NJ |
| 2010-06-21 | 973-544-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF NEW JERSEY, LLC - NJ | 264F | MILLBURN | NJ |
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.