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
2014-03-07 581-835 not yet reported which blocks → TELUS Quebec 2243 Garthby —
2014-03-07 581-840 not yet reported which blocks → TELUS Quebec 2243 Black Lake —
2014-03-07 757-740 0–9 XXXall 10 · 9 holders which blocks → PAETEC ITEL, LLC 829J FRANKLIN VA
2014-03-07 843-781 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BEAUFORT SC
2014-03-07 873-383 not yet reported which blocks → TELUS Quebec 2243 Ste-Eulalie —
2014-03-07 873-384 not yet reported which blocks → TELUS Quebec 2243 St-Celestin —
2014-03-07 873-385 not yet reported which blocks → TELUS Quebec 2243 Ste-Gertrude —
2014-03-07 873-386 not yet reported which blocks → TELUS Quebec 2243 Buckingham —
2014-03-07 873-390 not yet reported which blocks → TELUS Quebec 2243 Maniwaki —
2014-03-07 929-286 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN04 NY
2014-03-07 951-432 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORONA CA
2014-03-06 337-508 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LK CHARLES LA
2014-03-06 360-932 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2014-03-06 413-404 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-03-06 425-326 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-03-06 440-641 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F TRINITY OH
2014-03-06 785-327 not yet reported which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 MAYETTA KS
2014-03-06 785-490 not yet reported which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 HOYT KS
2014-03-06 785-573 not yet reported which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 VALLEY FLS KS
2014-03-06 785-642 not yet reported which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 OZAWKIE KS
2014-03-06 919-230 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CARY NC
2014-03-06 984-244 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DURHAM NC
2014-03-05 205-760 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BESSEMER AL
2014-03-05 219-281 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CROWNPOINT IN
2014-03-05 224-334 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2014-03-05 248-518 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CLARKSTON MI
2014-03-05 309-315 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GALESBURG IL
2014-03-05 402-807 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2014-03-05 509-309 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2014-03-05 586-221 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MT CLEMENS MI
2014-03-05 614-817 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 COLUMBUS OH
2014-03-05 681-620 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - WV 6284 KEYSER WV
2014-03-05 681-668 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEAT LAKE WV
2014-03-05 720-645 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2014-03-05 772-207 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C PTST LUCIE FL
2014-03-05 941-877 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G BRADENTON FL
2014-03-05 970-815 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2014-03-04 209-355 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MERCED CA
2014-03-04 323-741 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LSAN DA 02 CA
2014-03-04 440-561 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAGRINFLS OH
2014-03-04 513-657 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2014-03-04 541-972 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2014-03-04 561-430 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BOCA RATON FL
2014-03-04 873-700 not yet reported which blocks → Iristel Inc. 154E Drummondville —
2014-03-04 915-213 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2014-03-04 916-581 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2014-03-04 971-319 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2014-03-03 209-325 0–9 XXXall 10 · 6 holders which blocks → PACIFIC BELL 9740 MERCED CA
2014-03-03 219-318 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 GARY IN
2014-03-03 260-209 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FORT WAYNE IN

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.