NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2023-01-11 945-285 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J KAUFMAN TX
2023-01-11 945-405 4XXX which blocks → ONVOY, LLC - TX 903C ITALY TX
2023-01-11 945-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C LEWISVILLE TX
2023-01-11 945-523 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C CARROLLTON TX
2023-01-11 949-712 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2023-01-11 971-443 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
2023-01-11 980-608 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - NC 638E CLEVELAND NC
2023-01-11 984-320 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LOUISBURG NC
2023-01-10 224-492 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHBROOK IL
2023-01-10 253-362 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WA 483E SUMNER WA
2023-01-10 253-452 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E KENT WA
2023-01-10 269-550 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 KALAMAZOO MI
2023-01-10 331-293 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AURORA IL
2023-01-10 352-802 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C HAWTHORNE FL
2023-01-10 365-643 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-01-10 367-898 not yet reported which blocks → Bell Mobility 6574 Chicoutimi —
2023-01-10 437-297 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-01-10 445-274 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA
2023-01-10 463-281 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2023-01-10 464-209 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2023-01-10 474-752 not yet reported which blocks → Bell Mobility 6574 Regina —
2023-01-10 561-917 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2023-01-10 572-552 0XXX1XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F CALVIN OK
2023-01-10 574-392 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GOSHEN IN
2023-01-10 662-972 0XXX1XXX7XXX · 2 holders which blocks → ONVOY, LLC - MS 719E KILMICHAEL MS
2023-01-10 681-421 2XXX which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - WV 423C ELLENBORO WV
2023-01-10 782-568 not yet reported which blocks → Fibernetics Corporation 464D Amherst —
2023-01-10 804-653 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 RICHMOND VA
2023-01-10 807-514 not yet reported which blocks → Bell Mobility 6574 Kenora —
2023-01-10 835-212 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN13 PA
2023-01-10 901-780 0XXX1XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - TN 525E WESTWHITEV TN
2023-01-10 904-946 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C ST JOHNS FL
2023-01-10 904-948 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C MAXVILLE FL
2023-01-10 930-269 0XXX2XXX6XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 ELIZABTHTN IN
2023-01-09 225-509 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C WH CASTLE LA
2023-01-09 234-363 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MASSILLON OH
2023-01-09 240-980 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2023-01-09 262-340 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 NEWBURG WI
2023-01-09 269-395 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BENTON HBR MI
2023-01-09 340-204 not yet reported which blocks → LIBERTY MOBILE USVI INC. 638J CHTAMSTTHS VI
2023-01-09 351-237 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 TEMPLETON MA
2023-01-09 365-496 not yet reported which blocks → Fibernetics Corporation 464D Ancaster —
2023-01-09 365-497 not yet reported which blocks → Fibernetics Corporation 464D Hamilton —
2023-01-09 365-498 not yet reported which blocks → Fibernetics Corporation 464D Stoney Creek —
2023-01-09 380-257 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBLIN OH
2023-01-09 516-957 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2023-01-09 551-367 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2023-01-09 551-368 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2023-01-09 571-597 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2023-01-09 571-603 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.