NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-01-13 619-636 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2015-01-13 669-251 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2015-01-13 818-213 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 RESEDA CA
2015-01-13 909-682 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2015-01-13 970-866 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LA SALLE CO
2015-01-13 980-368 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LAWNDALE NC
2015-01-13 980-505 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CHARLOTTE NC
2015-01-13 980-925 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GASTONIA NC
2015-01-13 984-364 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CHAPELHILL NC
2015-01-12 219-501 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C HAMMOND IN
2015-01-12 559-668 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRESNO CA
2015-01-12 567-360 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEW BREMEN OH
2015-01-12 843-940 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BEAUFORT SC
2015-01-12 949-524 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2015-01-12 951-456 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MIRA LOMA CA
2015-01-10 256-290 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOULTON AL
2015-01-10 413-270 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NORTHAMPTN MA
2015-01-10 762-210 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 BLUE RIDGE GA
2015-01-10 812-693 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 CRANE IN
2015-01-09 289-720 not yet reported which blocks → Distributel 082E Brampton —
2015-01-09 289-721 not yet reported which blocks → Distributel 082E Malton —
2015-01-09 289-722 not yet reported which blocks → Distributel 082E Cooksville —
2015-01-09 289-726 not yet reported which blocks → Distributel 082E Streetsville —
2015-01-09 289-731 not yet reported which blocks → Distributel 082E Oshawa —
2015-01-09 308-365 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E NO JULESBG NE
2015-01-09 313-789 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C DETROITZN6 MI
2015-01-09 470-599 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2015-01-09 657-263 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D GARDEN GRV CA
2015-01-09 762-219 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 DALTON GA
2015-01-09 778-299 not yet reported which blocks → Distributel 081E Dawson Creek —
2015-01-09 814-915 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 JOHNSTOWN PA
2015-01-09 878-313 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ROCHESTER PA
2015-01-09 912-689 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 BRUNSWICK GA
2015-01-09 949-434 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D SADLBK VLY CA
2015-01-09 951-422 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D PERRIS CA
2015-01-09 970-810 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 GREELEY CO
2015-01-09 970-820 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9636 LOVELAND CO
2015-01-08 224-516 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAKEFOREST IL
2015-01-08 289-727 not yet reported which blocks → Distributel 082E Clarkson —
2015-01-08 289-732 not yet reported which blocks → Distributel 082E Whitby —
2015-01-08 289-733 not yet reported which blocks → Distributel 082E Ajax-Pickering —
2015-01-08 289-734 not yet reported which blocks → Distributel 082E South Pickering —
2015-01-08 518-977 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, INC. - NY 525G ALBANY NY
2015-01-08 785-576 0–9 XXXall 10 · 5 holders which blocks → TC WIRELESS, INC - KS 433H ABILENE KS
2015-01-07 639-450 not yet reported which blocks → SaskTel Mobility 9868 Estevan —
2015-01-07 757-386 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON1 VA
2015-01-07 929-320 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN14 NY
2015-01-07 929-374 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN05 NY
2015-01-06 509-913 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OTHELLO WA
2015-01-06 571-342 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.