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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-03-05 307-361 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BAGGS WY
2021-03-05 320-445 0–9 XXXall 10 · 7 holders which blocks → STRATUS NETWORKS 495J ALEXANDRIA MN
2021-03-05 413-393 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J WESTFIELD MA
2021-03-05 442-386 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H VICTORVL CA
2021-03-05 479-413 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H ROGERS AR
2021-03-05 480-743 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-05 505-418 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J ALBUQURQUE NM
2021-03-05 505-456 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J ALBUQURQUE NM
2021-03-05 507-785 0XXX1XXX8XXX9XXX · 2 holders which blocks → STRATUS NETWORKS 495J ROCHESTER MN
2021-03-05 531-254 0–9 XXXall 10 · 3 holders which blocks → ALLO COMMUNICATIONS LLC 907K LINCOLN NE
2021-03-05 559-758 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H PARLIER CA
2021-03-05 559-946 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H VISALIA CA
2021-03-05 561-643 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2021-03-05 602-804 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H PHOENIX AZ
2021-03-05 602-860 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-03-05 657-499 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ORANGE CA
2021-03-05 657-599 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H WESTMINSTR CA
2021-03-05 689-228 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H REEDYCREEK FL
2021-03-05 719-318 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J COLORDOSPG CO
2021-03-05 720-804 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LONGMONT CO
2021-03-05 720-813 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J DENVER CO
2021-03-05 740-798 1XXX7XXX · 2 holders which blocks → STRATUS NETWORKS 495J DEXTERCITY OH
2021-03-05 816-638 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - MO 093F STEWARTSVL MO
2021-03-05 816-980 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F GOWER MO
2021-03-05 845-852 0–9 XXXall 10 · 4 holders which blocks → UCOMTEL INC. 534J CROTON FLS NY
2021-03-05 873-438 not yet reported which blocks → Fibernetics Corporation 464D St-Malo —
2021-03-05 873-439 not yet reported which blocks → Fibernetics Corporation 464D Stoke —
2021-03-05 873-440 not yet reported which blocks → Fibernetics Corporation 464D St-Sebastien (Frontenac Co.) —
2021-03-05 873-441 not yet reported which blocks → Fibernetics Corporation 464D Weedon —
2021-03-05 873-442 not yet reported which blocks → Fibernetics Corporation 464D Windsor —
2021-03-05 873-443 not yet reported which blocks → Fibernetics Corporation 464D Wotton —
2021-03-05 928-798 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E YUMA AZ
2021-03-05 970-503 0–9 XXXall 10 · 3 holders which blocks → ALLO COMMUNICATIONS LLC 907K GREELEY CO
2021-03-04 207-410 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ME 7777 EMILLINCKT ME
2021-03-04 213-551 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-03-04 308-477 0XXX9XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WILCOX NE
2021-03-04 309-860 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MAQUON IL
2021-03-04 352-791 0XXX1XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOWEYINHLS FL
2021-03-04 419-417 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANSFIELD OH
2021-03-04 480-679 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J PHOENIX AZ
2021-03-04 501-451 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J LITTLEROCK AR
2021-03-04 510-916 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-04 520-537 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J TUCSON AZ
2021-03-04 531-255 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K OMAHA NE
2021-03-04 619-918 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-03-04 660-680 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F SEDALIA MO
2021-03-04 725-245 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NELSON NV
2021-03-04 725-543 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J INDIAN SPG NV
2021-03-04 775-467 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J RENO NV
2021-03-04 775-469 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J PAHRUMP NV

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.