NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 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
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
2023-05-31 504-498 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2023-05-31 516-212 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NASSAUZN03 NY
2023-05-31 516-979 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN08 NY
2023-05-31 516-981 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN09 NY
2023-05-31 520-435 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WILLCOX AZ
2023-05-31 531-325 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2023-05-31 571-640 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E MANASSAS VA
2023-05-31 640-249 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEW EGYPT NJ
2023-05-31 669-330 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
2023-05-31 669-334 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
2023-05-31 719-750 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D PUEBLO CO
2023-05-31 754-239 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C HOLLYWOOD FL
2023-05-31 757-540 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E NRFOLKZON2 VA
2023-05-31 771-233 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WSHNGTNZN1 DC
2023-05-31 772-289 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PTST LUCIE FL
2023-05-31 786-934 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2023-05-31 786-935 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 KEYS FL
2023-05-31 804-816 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E RICHMOND VA
2023-05-31 840-231 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 POMONA CA
2023-05-31 850-335 0XXX5XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PANAMACITY FL
2023-05-31 878-215 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J INDIANA PA
2023-05-31 917-914 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2023-05-31 918-405 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SPERRY OK
2023-05-30 354-201 not yet reported which blocks → Iristel Inc. 154E Chateauguay —
2023-05-30 354-307 not yet reported which blocks → Iristel Inc. 154E St-Lambert —
2023-05-30 368-208 not yet reported which blocks → Iristel Inc. 154E Hinton —
2023-05-30 442-401 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J VICTORVL CA
2023-05-30 470-404 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2023-05-30 470-478 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2023-05-30 484-835 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - PA 547E BATH PA
2023-05-30 650-751 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WOODSIDE CA
2023-05-30 840-230 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J POMONA CA
2023-05-30 939-370 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2023-05-30 939-372 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2023-05-29 548-467 not yet reported which blocks → ISP Telecom Inc. 4727 Paris —
2023-05-29 579-715 not yet reported which blocks → Fibernetics Corporation 464D Boucherville —
2023-05-29 579-716 not yet reported which blocks → Fibernetics Corporation 464D Chambly —
2023-05-29 579-717 not yet reported which blocks → Fibernetics Corporation 464D Longueuil —
2023-05-26 205-334 0XXX1XXX3XXX4XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BUTLER AL
2023-05-26 239-447 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NO NAPLES FL
2023-05-26 252-647 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 SWNSBRWCAR NC
2023-05-26 267-215 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN4 PA
2023-05-26 313-210 0–9 XXXall 10 · 3 holders which blocks → FIVE9, INC. 598J DETROITZN1 MI
2023-05-26 325-334 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN SABA TX
2023-05-26 445-215 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN3 PA
2023-05-26 508-978 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MA 892D TAUNTON MA
2023-05-26 614-740 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 COLUMBUS OH
2023-05-26 628-289 0–9 XXXall 10 · 3 holders which blocks → FIVE9, INC. 598J SNFC CNTRL CA
2023-05-26 659-659 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FAYETTE AL
2023-05-26 828-716 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 RUTHEFRDTN NC

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.