NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2002-10-28 580-750 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 MEDFORD OK
2002-10-28 636-212 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MAXVILLE MO
2002-10-28 636-222 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CEDAR HILL MO
2002-10-28 774-267 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 NORTHBORO MA
2002-10-28 781-540 0XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → METROPCS, INC. 5562 NEEDHAM MA
2002-10-28 781-548 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → METROPCS, INC. 5562 WAKEFIELD MA
2002-10-28 781-568 2XXX3XXX4XXX5XXX6XXX which blocks → METROPCS, INC. 5562 STONEHAM MA
2002-10-28 781-570 2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 WINCHESTER MA
2002-10-28 781-576 1XXX3XXX4XXX · 2 holders which blocks → METROPCS, INC. 5562 MARBLEHEAD MA
2002-10-28 781-591 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WELLESLEY MA
2002-10-28 832-228 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2002-10-28 847-865 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUCONDA IL
2002-10-28 857-201 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WINTHROP MA
2002-10-28 907-988 not yet reported which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 6872 JUNEAU AK
2002-10-28 978-408 0XXX2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 BILLERICA MA
2002-10-28 978-413 none assigned yet which blocks → METROPCS, INC. 5562 WESTFORD MA
2002-10-28 978-417 none assigned yet which blocks → METROPCS, INC. 5562 NEWBURYPT MA
2002-10-28 978-471 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → METROPCS, INC. 5562 IPSWICH MA
2002-10-28 978-512 4XXX which blocks → METROPCS, INC. 5562 TYNGSBORO MA
2002-10-25 276-229 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WOOLWINE VA
2002-10-25 516-385 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
2002-10-25 571-272 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2002-10-25 571-273 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2002-10-25 617-980 none assigned yet which blocks → METROPCS, INC. 5562 MILTON MA
2002-10-25 631-662 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON NY
2002-10-25 781-201 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 SHARON MA
2002-10-25 781-204 2XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORWELL MA
2002-10-25 781-252 2XXX which blocks → METROPCS, INC. 5562 WHITMAN MA
2002-10-25 781-351 4XXX5XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 ROCKLAND MA
2002-10-25 781-408 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 STOUGHTON MA
2002-10-25 781-414 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 NORWOOD MA
2002-10-25 781-470 1XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SCITUATE MA
2002-10-25 781-500 none assigned yet which blocks → METROPCS, INC. 5562 MARSHFIELD MA
2002-10-25 781-510 4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RANDOLPH MA
2002-10-25 781-520 4XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SAUGUS MA
2002-10-25 978-404 4XXX5XXX7XXX8XXX which blocks → METROPCS, INC. 5562 WILMINGTON MA
2002-10-24 231-679 6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BIG RAPIDS MI
2002-10-24 260-243 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ANGOLA IN
2002-10-24 361-208 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 YOAKUM TX
2002-10-24 517-375 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FOWLERVL MI
2002-10-24 520-200 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7175 HAYDEN AZ
2002-10-24 520-201 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7175 SAN MANUEL AZ
2002-10-24 662-823 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E TUPELO MS
2002-10-24 774-201 none assigned yet which blocks → METROPCS, INC. 5562 WESTPORT MA
2002-10-24 774-219 none assigned yet which blocks → METROPCS, INC. 5562 FOXBORO MA
2002-10-24 774-236 5XXX6XXX7XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NANTUCKET MA
2002-10-24 774-269 0XXX which blocks → METROPCS, INC. 5562 SAGAMORE MA
2002-10-24 774-285 5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 MARLBORO MA
2002-10-24 774-286 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NATICK MA
2002-10-24 774-287 none assigned yet which blocks → METROPCS, INC. 5562 SHREWSBURY MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.