NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 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
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
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
2023-07-11 367-968 not yet reported which blocks → Fibernetics Corporation 464D St-Nicolas —
2023-07-11 464-221 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C BERWYN IL
2023-07-11 464-223 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → ONVOY, LLC 224C PEOTONE IL
2023-07-11 561-930 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, LLC 472K DELRAY BCH FL
2023-07-11 754-324 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C FTLAUDERDL FL
2023-07-11 786-957 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C MIAMI FL
2023-07-11 825-521 not yet reported which blocks → Videotron Ltd. 328F Calgary —
2023-07-11 845-967 0XXX1XXX9XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H KERHONKSON NY
2023-07-11 845-970 0XXX1XXX2XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H LIVISTNMNR NY
2023-07-11 850-715 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MILTON FL
2023-07-11 971-453 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2023-07-10 236-908 not yet reported which blocks → Fibernetics Corporation 464D Chilliwack —
2023-07-10 431-370 not yet reported which blocks → Fibernetics Corporation 464D Winnipeg —
2023-07-10 609-640 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ATLNTIC CY NJ
2023-07-10 609-856 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN NJ
2023-07-10 610-920 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN30 PA
2023-07-10 732-755 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PERTHAMBOY NJ
2023-07-10 908-597 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2023-07-07 262-316 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WI 225C WAUKESHA WI
2023-07-07 409-312 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HTCHCCKSNF TX
2023-07-07 430-254 1XXX2XXX · 2 holders which blocks → ONVOY, LLC - TX 903C REDWATER TX
2023-07-07 430-281 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C CARTHAGE TX
2023-07-07 430-325 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C MINEOLA TX
2023-07-07 434-346 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANVILLE VA
2023-07-07 571-647 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-07-07 579-574 not yet reported which blocks → Cooptel 818D Ste-Marguerite —
2023-07-07 580-508 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TALOGA OK
2023-07-07 610-835 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SLATINGTON PA
2023-07-07 873-574 not yet reported which blocks → Cooptel 818D St-Donat-de-Montcalm —
2023-07-07 903-254 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL TX
2023-07-07 920-879 0XXX1XXX2XXX8XXX · 2 holders which blocks → ONVOY, LLC - WI 225C WAUPUN WI
2023-07-07 930-265 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D NEW ALBANY IN
2023-07-07 941-327 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PTCHARLOTT FL
2023-07-07 959-252 0XXX1XXX2XXX8XXX9XXX which blocks → ONVOY, LLC - CT 639C ROCKVILLE CT
2023-07-06 201-609 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H UNION CITY NJ
2023-07-06 283-283 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H CINCINNATI OH
2023-07-06 309-941 6XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 TOWANDA IL
2023-07-06 316-229 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KS 205F EL DORADO KS
2023-07-06 316-277 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H WICHITA KS
2023-07-06 326-214 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C FRANKLIN OH
2023-07-06 346-679 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2023-07-06 347-646 0–9 XXXall 10 · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN06 NY
2023-07-06 413-457 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2023-07-06 419-200 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OH 464C VANLUE OH
2023-07-06 419-317 2XXX3XXX9XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BERLIN HTS OH
2023-07-06 478-404 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H MACON GA
2023-07-06 504-225 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2023-07-06 615-629 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NASHVILLE TN
2023-07-06 616-297 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C LOWELL MI
2023-07-06 678-912 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA SO GA

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.