NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days
T-MOBILE USA, INC. 68
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-06-11 304-915-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN7 WV
2018-06-11 304-915-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN7 WV
2018-06-11 304-945-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN5 WV
2018-06-11 304-945-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN5 WV
2018-06-11 304-965-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN3 WV
2018-06-11 304-988-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN2 WV
2018-06-11 619-771-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2018-06-11 669-293-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNJS NORTH CA
2018-06-11 681-200-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PRKRSBGZN2 WV
2018-06-11 681-200-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PRKRSBGZN2 WV
2018-06-11 681-200-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PRKRSBGZN2 WV
2018-06-11 681-217-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHRLSTNZN6 WV
2018-06-11 681-237-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PTPLEASANT WV
2018-06-11 681-237-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PTPLEASANT WV
2018-06-11 681-237-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PTPLEASANT WV
2018-06-11 681-307-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOGAN WV
2018-06-11 681-307-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOGAN WV
2018-06-11 681-307-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOGAN WV
2018-06-11 681-378-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2018-06-11 818-213-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RESEDA CA
2018-06-08 385-492-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2018-06-08 510-650-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-06-08 510-650-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-06-08 515-575-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALGONA IA
2018-06-08 515-949-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EAGLEGROVE IA
2018-06-08 530-317-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLVL WEST CA
2018-06-08 760-896-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RAMONA CA
2018-06-08 951-466-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2018-06-07 702-861-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAUGHLIN NV
2018-06-05 573-554-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2018-05-30 479-343-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VAN BUREN AR
2018-05-25 425-624-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-25 425-624-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-25 425-624-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-24 510-603-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2018-05-24 619-830-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2018-05-24 747-333-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2018-05-24 858-703-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2018-05-24 909-470-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-05-24 928-310-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2018-05-24 949-942-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2018-05-16 707-613-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EUREKA CA
2018-05-14 424-528-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 442-484-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-05-09 385-955-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-09 385-955-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.