58/100IFR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 267 Google reviews, the most in Portsmouth.
Based on 8 of 9 factors; recency not yet collected.
Best Network Cabling And Installation Companies in Portsmouth, NH (2026)
43 network cabling and installation companies ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Portsmouth: RJ Installations & Design, IFR Score 58/100; 4.9★ from 267 Google reviews; open 7 days a week.
- 10
Most-reviewed: Harbor IT, 148 Google reviews at 4.9★, the most of 43 ranked after RJ Installations & Design; ranked #10.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
43 Portsmouth network cabling and installation companies are ranked here by IFR Score, from nine published factors. 12 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 5.0★ across 43 rated IT firms.
Top 10 network cabling and installation companies in Portsmouth at a glance
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
| Rank | Business | IFR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | RJ Installations & Design | 58 | 4.9★ (267) | Dracut, 39 mi away | Sat · Sun · Evenings | Overall |
| 2 | Daystar - Portsmouth Managed IT Services Company | 56 | 5.0★ (23) | Portsmouth | Sat · Sun · Evenings | — |
| 3 | Quantum Fiber Services | 55 | 3.7★ (3) | Rochester, 21 mi away | Sat · Sun · Evenings | — |
| 4 | Statewide Communications Inc | 55 | 5.0★ (89) | Wilmington, 39 mi away | Sat · Sun · Evenings | — |
| 5 | NH Digital Group | 54 | 5.0★ (13) | Portsmouth | Sat · Sun · Evenings | — |
| 6 | Geek To You Technology | 54 | 4.3★ (32) | Durham, 14 mi away | Sat · Sun · Evenings | — |
| 7 | RGRealTech | 53 | 5.0★ (26) | Bedford, 12 mi away | Sat · Sun · Evenings | — |
| 8 | Nessit - New Hampshire Managed IT Services Company | 53 | 4.9★ (17) | Somersworth, 14 mi away | Sat · Sun · Evenings | — |
| 9 | Resolve Data | 53 | 5.0★ (8) | Haverhill, 27 mi away | — | — |
| 10 | Harbor IT | 53 | 4.9★ (148) | Salem, 33 mi away | — | Most reviews |
The 43 best network cabling and installation companies in Portsmouth, ranked
Ordered by IFR Score, a 0–100 score from nine published factors. Paid placement never changes the order.
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
Based in Portsmouth
56/100IFR ScoreRanked #2 because of its Google rating and review volume: 5.0★ from 23 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Rochester, 21 mi away
55/100IFR ScoreRanked #3 because of its Google rating and service focus: 3.7★ from 3 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Based in Wilmington, 39 mi away
55/100IFR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 89 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Portsmouth
54/100IFR ScoreRanked #5 because of its Google rating and service focus: 5.0★ from 13 Google reviews, listed on Google as “Computer support and services”.
Based on 8 of 9 factors; recency not yet collected.
Based in Durham, 14 mi away
54/100IFR ScoreRanked #6 because of its Google rating and review volume: 4.3★ from 32 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#7 RGRealTech
Based in Bedford, 12 mi away
53/100IFR ScoreRanked #7 because of its Google rating and review volume: 5.0★ from 26 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Somersworth, 14 mi away
53/100IFR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 17 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#9 Resolve Data
Based in Haverhill, 27 mi away
53/100IFR ScoreRanked #9 because of its Google rating and service focus: 5.0★ from 8 Google reviews, listed on Google as “Computer networking service”.
Based on 8 of 9 factors; recency not yet collected.
#10 Harbor IT
Based in Salem, 33 mi away
53/100IFR ScoreRanked #10 because of its Google rating and review volume: 4.9★ from 148 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Concord, 37 mi away
52/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.3★ from 6 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Sanford, 24 mi away
52/100IFR ScoreRanked #12 because of its Google rating and review volume: 5.0★ from 44 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Manchester, 36 mi away
51/100IFR ScoreRanked #13 because of its Google rating and review volume: 4.8★ from 49 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#14 Dellitech
Based in Danvers, 35 mi away
51/100IFR ScoreRanked #14 because of its Google rating and review volume: 5.0★ from 93 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Biddeford, 33 mi away
51/100IFR ScoreRanked #15 because of its Google rating and service focus: 3.7★ from 3 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Sanford, 26 mi away
51/100IFR ScoreRanked #16 because of its Google rating and service focus: 5.0★ from 3 Google reviews, listed on Google as “Computer networking service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Portsmouth
50/100IFR ScoreRanked #17 because of its Google rating and service focus: 5.0★ from 14 Google reviews, listed on Google as “Computer support and services”.
Based on 8 of 9 factors; recency not yet collected.
Based in Biddeford, 31 mi away
49/100IFR ScoreRanked #18 because of its Google rating and review volume: 4.9★ from 52 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Portsmouth
49/100IFR ScoreRanked #19 because of its Google rating and service focus: 5.0★ from 10 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in Gloucester, 30 mi away
49/100IFR ScoreRanked #20 because of its Google rating and review volume: 5.0★ from 35 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#21 Wicked MoJo I.T.
Based in Derry, 32 mi away
48/100IFR ScoreRanked #21 because of its Google rating and review volume: 4.6★ from 52 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#22 TechMate
Based in Durham, 2 mi away
48/100IFR ScoreRanked #22 because of its Google rating and service focus: 5.0★ from 7 Google reviews, listed on Google as “Computer repair service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Manchester, 36 mi away
48/100IFR ScoreRanked #23 because of its Google rating and review volume: 4.4★ from 67 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#24 SaviorLabs
Based in Beverly, 33 mi away
47/100IFR ScoreRanked #24 because of its Google rating and review volume: 5.0★ from 25 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Peabody, 39 mi away
47/100IFR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 27 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
All 43 network cabling and installation companies
#1 to #25 are shown in full above. Here are #26 to #43, in IFR Score order; each links to its profile.
| Rank | Business | IFR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Anziani Technology Services | 46 | 5.0★ (12) | 35 mi |
| 27 | PC Dynamix | 46 | 4.9★ (22) | 36 mi |
| 28 | IntelaWEB LLC | 46 | 5.0★ (5) | 8 mi |
| 29 | NH Security Cameras | 46 | 5.0★ (9) | 32 mi |
| 30 | Shoreline Systems | 45 | 5.0★ (7) | 32 mi |
| 31 | CaberLink Technologies | 45 | 5.0★ (16) | 36 mi |
| 32 | New England Simplified Technologies | 45 | 5.0★ (4) | 11 mi |
| 33 | Managed Technology Services, Inc. | 45 | 5.0★ (16) | 40 mi |
| 34 | Tailor-Made Audio & Video | 45 | 4.3★ (15) | 31 mi |
| 35 | JBR Computers | 45 | 5.0★ (15) | 36 mi |
| 36 | Braided Technologies | 44 | 5.0★ (7) | 27 mi |
| 37 | Visual Edge IT Londonderry, New Hampshire | 44 | 4.9★ (8) | 33 mi |
| 38 | White Mountain Cable Construction | 43 | 4.0★ (5) | 33 mi |
| 39 | Parrot Computers | 43 | 5.0★ (8) | 37 mi |
| 40 | Radius Executive IT Solutions | IT Services In Andover, MA and Boston Area | 42 | 5.0★ (5) | 35 mi |
| 41 | Rutter Networking Technologies | 42 | 5.0★ (5) | 35 mi |
| 42 | MicroData | 42 | 5.0★ (5) | 36 mi |
| 43 | GraNet IT Solutions LLC | 41 | 5.0★ (3) | 32 mi |
Also serving Portsmouth
20 more network cabling and installation companies within 40 mi that we can't rank yet: too few reviews, or a service we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 1-800 Office Solutions | 10 mi | |
| AK Associates | 5.0★ (1) | 33 mi |
| AMD Technology, Inc. | 5.0★ (1) | 9 mi |
| BTR Services INC | 5.0★ (1) | 28 mi |
| Consolidated Communications | 1.5★ (21) | In Portsmouth |
| ERF Computer Consulting | 5.0★ (1) | 40 mi |
| Great Bay Communications | In Portsmouth | |
| Innovative Cabling Systems Inc | 3.5★ (2) | 33 mi |
| Integrisys Communications Group, Inc | 5.0★ (1) | 34 mi |
| J H Turiel & Associates Inc | 5.0★ (1) | 39 mi |
| John's Computer Services | 14 mi | |
| Lancaster Communications Group | 5.0★ (1) | In Portsmouth |
| Lavin Electric Inc | 5.0★ (1) | 27 mi |
| MTS Services | 5.0★ (1) | In Portsmouth |
| MTS Services | 5.0★ (2) | 35 mi |
| Omega Digital Group - Portsmouth, NH | 5.0★ (1) | In Portsmouth |
| Quality Interconnect Cabling | 5.0★ (1) | 19 mi |
| Seaborn Networks | Transport & IP Services | 5.0★ (1) | 36 mi |
| Stellar Networks | 5.0★ (1) | 20 mi |
| Your Custom Smart Home AV Integration Service & Support Company - IntelliHome, LLC | 5.0★ (1) | 31 mi |
How we ranked Portsmouth network cabling and installation companies
We scored 43 Portsmouth network cabling and installation companies on nine factors, weighted as shown. An IT firm is ranked when its service is confirmed and it has 3 or more Google reviews or a claimed profile. An IT firm with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 9, 2026.
Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Portsmouth data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Review volume | 15% | Number of Google reviews, compared with the most-reviewed IT firm on the list | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday and 24/7 support | Measured |
| Service focus | 15% | How clearly the firm does this service (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The firm has claimed its IT Firms Ranked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The firm links to IT Firms Ranked from its own website with our badge, checked periodically | Measured |
| Client reviews | 10% | Verified client reviews collected by IT Firms Ranked: their rating and how many there are | Measured |
How to choose a network cabling company
- Ask which licence, permits and inspections your job needs locally, and who arranges them.
- Ask for a site survey and a written quote that lists cable type, number of runs and testing.
- Make sure each run is tested and certified, and that you receive the results.
- Check whether the firm also installs and configures switches and Wi-Fi, or only the cabling.
- Ask for two or three references from clients of your size and industry, and call them.
- Get the scope, response times and price in writing before you sign, including how you leave and get your data back.
Questions to ask a network cabling company
- Which licence do you hold for low-voltage work here, and will you pull the permit?
- Which cable category and brand do you install, and is there a manufacturer warranty?
- Will every run be tested and labelled, and will we receive the test results?
- Who handles the network equipment and Wi-Fi after the cabling is in?
- How do you handle work in occupied offices or after hours?
Terms explained
- MSP (managed service provider)
- A firm that runs a business’s IT for a recurring fee: monitoring, patching, help desk, backups and security tools.
- Co-managed IT
- An arrangement where an outside firm supports an in-house IT person or team, sharing tools and tasks.
- Break-fix
- IT support paid per incident or per hour, with no monthly agreement.
- SLA (service-level agreement)
- The contract terms for response and resolution times, uptime and support hours.
- Help desk
- The support line staff call or email for IT problems.
- RMM
- Remote monitoring and management software that lets an IT firm watch, patch and fix computers remotely.
- vCIO
- A virtual chief information officer: part-time IT strategy and budgeting from an outside firm.
- MSSP
- A managed security service provider: a firm that monitors and manages security tools around the clock.
- EDR / MDR
- Endpoint detection and response software, and the managed service of people watching its alerts (managed detection and response).
- MFA
- Multi-factor authentication: a second proof of identity, such as an app prompt, on top of a password.
- Penetration test
- An authorised, simulated attack on your systems to find weaknesses before criminals do.
- SOC 2
- An independent auditor’s report (AICPA standard) on a service provider’s security controls.
Network cabling and installation companies in Portsmouth: frequently asked questions
Who is the best network cabling company in Portsmouth?
By IFR Score, the highest-ranked network cabling company in Portsmouth, NH is RJ Installations & Design with an IFR Score of 58/100. It has 4.9★ from 267 Google reviews. It is open 7 days a week. Daystar - Portsmouth Managed IT Services Company (#2) and Quantum Fiber Services (#3) follow. We ranked 43 network cabling and installation companies on nine factors, last updated November 9, 2026.
How many network cabling and installation companies are there in Portsmouth?
ITFirmsRanked ranks 43 network cabling and installation companies serving Portsmouth, NH. 4 of them are based in Portsmouth; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of November 2026.
Which network cabling and installation companies in Portsmouth work on weekends?
12 of 43 ranked network cabling and installation companies post Saturday hours and 9 post Sunday hours. The highest-ranked open Saturdays are RJ Installations & Design (#1), Daystar - Portsmouth Managed IT Services Company (#2) and Quantum Fiber Services (#3). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Portsmouth network cabling and installation companies have?
The median Google rating among 43 rated network cabling and installation companies in Portsmouth is 5.0★, with a median of 14 reviews. RJ Installations & Design has the most, 267 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank network cabling and installation companies?
Each network cabling company gets a 0–100 IFR Score from nine published factors, led by reputation (25%), review volume (15%), service focus (15%) and recency (10%). An IT firm with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only IT firms with a confirmed service and 3 or more reviews, or a claimed profile, are ranked.
Do network cabling and installation companies outside Portsmouth count in this ranking?
Yes, if they are within 40 mi of the Portsmouth city center, our service radius for network cabling and installation companies. Each listing shows where the IT firm is based and how far away it is. Proximity is 5% of the IFR Score, so a nearby IT firm gets a small edge.
Can network cabling and installation companies pay to rank higher on ITFirmsRanked?
No. The IFR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured IT firms may appear above the list, labelled Sponsored and showing their honest rank.
What does a network cabling company do?
Network cabling companies design and install structured cabling (Cat6, fibre), racks, Wi-Fi access points and network equipment in offices, warehouses and new buildings.
How are network cabling and installation companies in Portsmouth ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does network cabling and installation, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
Does network cabling need a licence?
It depends on where you are. Some states and provinces license low-voltage or limited-energy work (California’s C-7 low voltage classification and Washington’s limited energy specialty are examples) and many cities require permits. Ask the firm which licence and permits apply to your job.
What should we get when the cabling is finished?
Labelled cables and patch panels, test results for every run and a floor plan showing where each run goes. Those records make later changes and fault-finding much faster.
Update log for Portsmouth
- November 2026: IFR Scores recalculated for 43 network cabling and installation companies serving Portsmouth.
More network cabling and installation companies and Portsmouth pages
Network cabling and installation companies near Portsmouth
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