FCC Broadband Data Collection, Dec 2024 vintage, residential filings — broadbandmap.fcc.gov. Availability is address-specific within each ZIP.
Check your Portsmouth ZIP code against the same FCC filings:
Call (833) 390-3014Portsmouth internet providers at a glance
Of the 10 residential providers in the filings for Portsmouth, the six below reach the most of its six ZIP codes by wire, 5G or fixed wireless.
| Provider | Technology | ZIPs served (of 6) | Top filed speed |
|---|---|---|---|
| Cox | Cable + Fiber | 5 | 2 Gbps |
| Verizon 5G Home | 5G Home | 5 | 1 Gbps |
| Verizon Fios | Fiber | 5 | 940 Mbps |
| AT&T Internet Air | 5G Home | 5 | 100 Mbps |
| T-Mobile Home Internet | 5G Home | 5 | 100 Mbps |
| Spectrum | Cable | 2 | 1 Gbps |
Where wired service stops, 5G home internet is filed in some ZIP codes (Verizon 5G Home, AT&T Internet Air, and T-Mobile Home Internet in five of six) and satellite (Starlink, Viasat, HughesNet) in all of them.
No single wired network covers all of Portsmouth: Cox and Verizon Fios each reach all but one of the six ZIP codes. The fiber map has gaps — one of six ZIP codes has no fiber provider on file. Of the wired networks with the widest reach, Cox files the highest speed, 2 Gbps.