NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
— 872-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 872-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IL
— 872-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 872-700 not yet reported which blocks → IL
— 872-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 872-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 872-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 872-950 not yet reported which blocks → IL
— 872-958 not yet reported which blocks → IL
— 872-959 not yet reported which blocks → IL
— 872-976 not yet reported which blocks → IL
— 878-207 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ROCHESTER PA
— 878-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-222 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - PA 547E NEWWLMNGTN PA
— 878-228 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J UNIONTOWN PA
— 878-269 0XXX1XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - PA 547E PARKWOOD PA
— 878-288 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOLIVAR PA
— 878-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-333 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E ELLWOOD CY PA
— 878-400 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E WAMPUM PA
— 878-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-444 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E HOMER CITY PA
— 878-500 0XXX5XXX which blocks → FRACTEL, LLC 965H FORD CITY PA
— 878-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST PA
— 878-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-666 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E MARION CTR PA
— 878-700 not yet reported which blocks → PA
— 878-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-777 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E DERRY PA
— 878-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E PARKWOOD PA
— 878-900 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E EPALESTINE PA
— 878-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 878-950 not yet reported which blocks → PA
— 878-958 not yet reported which blocks → PA
— 878-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT PA
— 878-976 not yet reported which blocks → PA
— 901-200 not yet reported which blocks → SPOK, INC. 6630 MEMPHIS TN
— 901-201 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
— 901-202 2XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MEMPHIS TN
— 901-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX TN
— 901-205 3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MEMPHIS TN
— 901-210 none assigned yet which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
— 901-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 901-212 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MEMPHIS TN
— 901-213 6XXX7XXX8XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MEMPHIS TN
— 901-214 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
— 901-215 0XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
— 901-216 not yet reported which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.