NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-08-20 256-540 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → DOVETEL COMMUNICATIONS LLC - AL 799G WEDOWEE AL
2012-08-20 337-400 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2012-08-20 404-740 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-08-20 470-246 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2012-08-20 470-257 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-08-20 502-888 0–9 XXXall 10 · 4 holders which blocks → CORETEL KENTUCKY, INC. - KY 480F LOUISVILLE KY
2012-08-20 631-545 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E AMITYVILLE NY
2012-08-20 646-635 0–9 XXXwhole prefix which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
2012-08-20 646-636 0–9 XXXwhole prefix which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
2012-08-20 646-741 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2012-08-20 714-462 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GARDEN GRV CA
2012-08-20 714-587 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2012-08-20 774-337 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BREWSTER MA
2012-08-20 917-633 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2012-08-17 315-840 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E JORDAN NY
2012-08-17 405-479 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-546 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-673 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-679 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 438-495 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2012-08-17 505-257 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F LOS ALAMOS NM
2012-08-17 510-359 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-08-17 510-398 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2012-08-17 646-751 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2012-08-17 717-472 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 YORK PA
2012-08-17 819-830 not yet reported which blocks → Fido Solutions Inc. 5643 Amos —
2012-08-17 819-859 not yet reported which blocks → Fido Solutions Inc. 5643 Val-D'Or —
2012-08-17 819-880 not yet reported which blocks → Fido Solutions Inc. 5643 Rouyn-Noranda —
2012-08-17 864-516 0–9 XXXall 10 · 5 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 GREENVILLE SC
2012-08-17 901-402 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F MOSCOW TN
2012-08-17 917-636 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN14 NY
2012-08-17 917-765 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2012-08-17 919-964 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CREEDMOOR NC
2012-08-17 949-237 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2012-08-16 470-232 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ADAIRSVL GA
2012-08-16 470-252 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 GAINESVL GA
2012-08-16 516-580 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2012-08-16 614-813 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2012-08-16 646-634 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2012-08-16 720-355 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2012-08-16 857-285 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J CAMBRIDGE MA
2012-08-16 864-509 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GREENVILLE SC
2012-08-16 917-588 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2012-08-16 917-960 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2012-08-16 925-464 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2012-08-15 312-620 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-08-15 435-339 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2012-08-15 502-559 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LOUISVILLE KY
2012-08-15 715-725 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PLTC, LLC - WI 375F CECIL WI
2012-08-15 815-201 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E SHERIDAN IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.