NumberResearchThousands-blocks in 973-721
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 973-721 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 |
|---|---|---|---|---|---|---|---|
| 2010-06-22 | 973-721-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF NEW JERSEY, LLC - NJ | 264F | SUSSEX | NJ |
| 2010-06-22 | 973-721-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF NEW JERSEY, LLC - NJ | 264F | SUSSEX | NJ |
| 2025-06-12 | 973-721-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUSSEX | NJ |
| 2009-04-16 | 973-721-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUSSEX | NJ |
| 2009-05-28 | 973-721-4XXX | 4000–4999 | Assigned | SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NJ | 420F | SUSSEX | NJ |
| 2015-03-10 | 973-721-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | SUSSEX | NJ |
| 2014-03-31 | 973-721-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | SUSSEX | NJ |
| 2013-08-26 | 973-721-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SUSSEX | NJ |
| 2018-09-10 | 973-721-8XXX | 8000–8999 | Assigned | BLUEBIRD COMMUNICATIONS, LLC - NJ | 999H | SUSSEX | NJ |
| 2013-10-17 | 973-721-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF NEW JERSEY, LLC - NJ | 264F | SUSSEX | 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.