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
2011-07-14 587-401 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2011-07-14 587-402 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2011-07-14 587-776 not yet reported which blocks → Distributel 081E Calgary —
2011-07-14 587-779 not yet reported which blocks → Distributel 081E Calgary —
2011-07-14 613-903 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2011-07-14 615-926 0–9 XXXwhole prefix which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 NASHVILLE TN
2011-07-13 334-331 not yet reported which blocks → WINDSTREAM ALABAMA, INC. 0302 ECLECTIC AL
2011-07-13 587-255 not yet reported which blocks → TELUS Mobility 8301 Czar —
2011-07-13 587-256 not yet reported which blocks → TELUS Mobility 8301 Viking —
2011-07-13 587-331 not yet reported which blocks → Iristel Inc. 154E Calgary —
2011-07-13 587-332 not yet reported which blocks → Iristel Inc. 154E Calgary —
2011-07-13 609-253 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7310 FORT DIX NJ
2011-07-13 615-295 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MURFREESBO TN
2011-07-13 647-763 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-07-13 662-500 0XXX1XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C JONESTOWN MS
2011-07-13 778-524 not yet reported which blocks → Shaw Telecom Inc. 497E Skookumchuck —
2011-07-13 786-310 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MIAMI FL
2011-07-13 862-257 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K PATERSON NJ
2011-07-13 931-250 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CROSSVILLE TN
2011-07-12 226-606 not yet reported which blocks → Videotron Ltd. 383F Kitchener-Waterloo —
2011-07-12 229-586 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 TIFTON GA
2011-07-12 331-220 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2011-07-12 360-328 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SILVERDALE WA
2011-07-12 385-229 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-07-12 402-975 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NE 7144 LINCOLN NE
2011-07-12 404-801 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2011-07-12 470-233 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2011-07-12 484-577 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2011-07-12 503-509 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 STAYTON OR
2011-07-12 587-330 not yet reported which blocks → Iristel Inc. 154E Calgary —
2011-07-12 778-254 not yet reported which blocks → TELUS Mobility 8301 Lytton —
2011-07-12 778-629 not yet reported which blocks → CityWest Cable (North) Corp - BC 705F Port Edward —
2011-07-12 808-321 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI 6516 HONOLULU HI
2011-07-12 857-263 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-07-12 857-265 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-07-11 224-235 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2011-07-11 224-236 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BARTLETT IL
2011-07-11 229-287 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 PINEVIEW GA
2011-07-11 315-418 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
2011-07-11 315-570 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 UTICA NY
2011-07-11 315-816 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WATERTOWN NY
2011-07-11 331-200 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BARTLETT IL
2011-07-11 480-249 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-07-11 480-257 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-07-11 480-261 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2011-07-11 480-267 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2011-07-11 518-414 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2011-07-11 518-415 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GLENSFALLS NY
2011-07-11 631-416 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2011-07-11 716-262 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E BUFFALO NY

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.