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
2014-03-13 437-408 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-13 437-409 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-13 504-475 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C NEWORLEANS LA
2014-03-13 517-208 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BRITTON MI
2014-03-13 561-440 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2014-03-13 719-725 0–9 XXXall 10 · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 COLORDOSPG CO
2014-03-13 734-514 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C IDA MI
2014-03-13 812-803 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BLOOMINGTN IN
2014-03-13 910-613 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E BLADENBORO NC
2014-03-13 980-349 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2014-03-12 312-843 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2014-03-12 437-400 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-12 437-401 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-12 437-402 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-12 437-403 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-12 437-404 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2014-03-12 470-725 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2014-03-12 517-429 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HUDSON MI
2014-03-12 567-319 0XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WAPAKONETA OH
2014-03-12 567-702 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2014-03-12 570-790 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HAZLETON PA
2014-03-12 614-831 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GAHANNA OH
2014-03-12 615-982 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2014-03-12 720-418 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DENVER CO
2014-03-12 910-660 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WILMINGTON NC
2014-03-12 980-214 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CHARLOTTE NC
2014-03-12 980-330 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 SALISBURY NC
2014-03-12 984-209 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 DURHAM NC
2014-03-11 208-985 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BOISE ID
2014-03-11 256-843 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ARAB AL
2014-03-11 559-547 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-03-11 785-574 1XXX3XXX · 2 holders which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 OSKALOOSA KS
2014-03-11 786-656 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J MIAMI FL
2014-03-11 803-570 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 ORANGEBURG SC
2014-03-11 816-745 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2014-03-10 505-658 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F GRANTS NM
2014-03-10 585-449 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BELMONT NY
2014-03-10 646-760 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2014-03-10 901-513 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 MEMPHIS TN
2014-03-10 913-228 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2014-03-10 936-224 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CONROE TX
2014-03-07 314-309 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2014-03-07 319-449 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F CEDAR RPDS IA
2014-03-07 385-236 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2014-03-07 424-324 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2014-03-07 469-602 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C FORNEY TX
2014-03-07 470-310 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E FLOWEYBRCH GA
2014-03-07 515-414 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IA 221F DES MOINES IA
2014-03-07 563-293 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IA 221F DAVENPORT IA
2014-03-07 579-216 not yet reported which blocks → TELUS Quebec 2243 Cowansville —

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.