NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

3 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days — NPA 447
NEW CINGULAR WIRELESS PCS, LLC - IL 2
8X8, INC. 1
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-04-18 447-547 0XXX1XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C THAWVILLE IL
2021-04-18 447-557 0XXX1XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C SIDELL IL
2021-04-18 447-627 0XXX6XXX · 2 holders which blocks → ONVOY, LLC 224C SIBLEY IL
2021-04-18 447-644 0XXX4XXX6XXX · 3 holders which blocks → ONVOY, LLC 224C ROYAL IL
2021-04-18 447-677 0XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C POTOMAC IL
2021-04-17 447-227 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC 224C PAXTON IL
2021-04-17 447-237 0XXX4XXX · 2 holders which blocks → ONVOY, LLC 224C PENFIELD IL
2021-04-17 447-244 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C GEORGETOWN IL
2021-04-17 447-277 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C PHILO IL
2021-04-17 447-347 0XXX1XXX3XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C CHENEYVL IL
2021-04-17 447-647 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C MAHOMET IL
2021-04-17 447-674 0XXX7XXX · 2 holders which blocks → ONVOY, LLC 224C IVESDALE IL
2021-04-17 447-737 0XXX1XXX3XXX4XXX7XXX · 4 holders which blocks → ONVOY, LLC 224C EAST LYNN IL
2021-04-17 447-744 0XXX1XXX4XXX7XXX · 4 holders which blocks → ONVOY, LLC 224C BROADLANDS IL
2021-04-17 447-774 0XXX1XXX2XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C HOMER IL
2021-04-16 447-344 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → ONVOY, LLC 224C MTSTERLING IL
2021-04-16 447-574 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC 224C RUSHVILLE IL
2021-04-16 447-747 4XXX7XXX8XXX which blocks → ONVOY, LLC 224C BARRY IL
2021-04-13 447-437 0XXX3XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C BASCO IL
2021-04-13 447-440 2XXX4XXX · 2 holders which blocks → ONVOY, LLC 224C BOWEN IL
2021-04-13 447-441 1XXX4XXX · 2 holders which blocks → ONVOY, LLC 224C ELVASTON IL
2021-04-13 447-457 0XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C SUTTER IL
2021-04-02 447-203 0XXX1XXX2XXX3XXX5XXX · 3 holders which blocks → TELNYX LLC 073H ROBERTS IL
2021-04-02 447-787 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 SPRINGFLD IL
2021-04-02 447-788 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 SPRINGFLD IL
2021-03-24 447-901 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSONVL IL
2021-03-18 447-445 0XXX1XXX2XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C INDIANOLA IL
2021-03-18 447-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C SPRINGFLD IL
2021-03-17 447-410 0XXX4XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2021-03-17 447-610 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC 224C JACKSONVL IL
2021-03-17 447-810 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C MATTOON IL
2021-03-03 447-201 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → IP HORIZON LLC 515J CHAMPAURBN IL
2021-03-03 447-202 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → IP HORIZON LLC 515J SPRINGFLD IL
2021-02-16 447-247 0XXX1XXX3XXX4XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H LODA IL
2021-02-16 447-336 0XXX1XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H MT PULASKI IL
2021-02-16 447-348 0XXX1XXX2XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H NEW BERLIN IL
2021-02-16 447-432 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H LUDLOW IL
2021-02-16 447-667 0XXX1XXX2XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H OGDEN IL
2021-02-16 447-758 6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ILLIOPOLIS IL
2021-02-16 447-786 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → FRACTEL, LLC 965H HARRISTOWN IL
2021-02-16 447-842 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DIVERNON IL
2021-02-16 447-946 0XXX1XXX3XXX4XXX6XXX · 4 holders which blocks → FRACTEL, LLC 965H MODESTO IL
2021-02-12 447-446 0XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → HD CARRIER LLC 321J CHAMPAURBN IL
2021-02-12 447-448 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J SPRINGFLD IL
2021-02-11 447-234 0XXX4XXX5XXX · 3 holders which blocks → FRACTEL, LLC 965H GIFFORD IL
2021-02-11 447-345 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CANTRALL IL
2021-02-11 447-477 0XXX1XXX4XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H FISHER IL
2021-02-01 447-200 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H MELVIN IL
2021-02-01 447-221 1XXX2XXX3XXX4XXX which blocks → ONVOY, LLC 224C WESTERVELT IL
2021-02-01 447-222 0XXX2XXX3XXX4XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H ARMSTRONG IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.