NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-05-23 226-710 not yet reported which blocks → InnSysVoice Corp 383H Sarnia —
2018-05-23 226-737 not yet reported which blocks → InnSysVoice Corp 383H Blenheim —
2018-05-23 226-870 not yet reported which blocks → InnSysVoice Corp 383H Watford —
2018-05-23 226-878 not yet reported which blocks → InnSysVoice Corp 383H Petrolia —
2018-05-23 226-940 not yet reported which blocks → InnSysVoice Corp 383H Bright's Grove —
2018-05-23 226-960 not yet reported which blocks → InnSysVoice Corp 383H Corunna —
2018-05-23 307-404 4XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICINBOW WY
2018-05-23 352-320 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BELLEVIEW FL
2018-05-23 561-377 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2018-05-23 581-691 not yet reported which blocks → Bell Canada 984C Frampton —
2018-05-23 581-692 not yet reported which blocks → Bell Canada 984C Saint-Bernard-de-Dorchester —
2018-05-23 609-913 0–9 XXXall 10 · 6 holders which blocks → TELENGY LLC 148J TRENTON NJ
2018-05-23 857-346 0–9 XXXall 10 · 4 holders which blocks → TELENGY LLC 148J BOSTON MA
2018-05-23 862-320 0–9 XXXall 10 · 6 holders which blocks → TELENGY LLC 148J NEWARK NJ
2018-05-22 236-753 not yet reported which blocks → Bell Mobility 6574 Fort St. John —
2018-05-22 312-500 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2018-05-22 639-321 not yet reported which blocks → Distributel 081E Alvena —
2018-05-22 639-322 not yet reported which blocks → Distributel 081E Asquith —
2018-05-22 639-325 not yet reported which blocks → Distributel 081E Beechy —
2018-05-22 639-326 not yet reported which blocks → Distributel 081E Biggar —
2018-05-22 639-327 not yet reported which blocks → Distributel 081E Blaine Lake —
2018-05-22 639-341 not yet reported which blocks → Distributel 081E Borden —
2018-05-22 639-342 not yet reported which blocks → Distributel 081E Bruno —
2018-05-22 639-346 not yet reported which blocks → Distributel 081E Colonsay —
2018-05-22 639-347 not yet reported which blocks → Distributel 081E Cudworth —
2018-05-22 639-348 not yet reported which blocks → Distributel 081E Dalmeny —
2018-05-22 639-349 not yet reported which blocks → Distributel 081E Delisle —
2018-05-22 639-350 not yet reported which blocks → Distributel 081E Dinsmore —
2018-05-22 639-351 not yet reported which blocks → Distributel 081E Duck Lake —
2018-05-22 639-352 not yet reported which blocks → Distributel 081E Dundurn —
2018-05-22 639-353 not yet reported which blocks → Distributel 081E Hafford —
2018-05-22 639-354 not yet reported which blocks → Distributel 081E Hague —
2018-05-22 639-356 not yet reported which blocks → Distributel 081E Hanley —
2018-05-22 639-357 not yet reported which blocks → Distributel 081E Hepburn —
2018-05-22 639-358 not yet reported which blocks → Distributel 081E Langham —
2018-05-22 639-359 not yet reported which blocks → Distributel 081E Lanigan —
2018-05-22 718-400 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN13 NY
2018-05-22 737-990 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H AUSTIN TX
2018-05-21 423-850 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TN 525E JONESBORO TN
2018-05-21 470-851 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA GA
2018-05-18 276-400 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E CMSRKELCRK VA
2018-05-18 276-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E SYLVATUS VA
2018-05-18 276-500 0XXX1XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - VA 138E CRIPPLECRK VA
2018-05-18 276-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E DAMASCUS VA
2018-05-18 276-800 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - VA 138E FRIES VA
2018-05-18 276-900 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E GLADE SPG VA
2018-05-18 561-356 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2018-05-18 639-319 not yet reported which blocks → Distributel 081E Aberdeen —
2018-05-18 639-320 not yet reported which blocks → Distributel 081E Allan —
2018-05-18 639-360 not yet reported which blocks → Distributel 081E Lucky Lake —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.