67/100IFR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 1,134 Google reviews, the most in Rancho Cucamonga.
Best Business Phone System Providers in Rancho Cucamonga, CA (2026)
347 business phone system providers ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Rancho Cucamonga: Call Tools, IFR Score 67/100; 5.0★ from 1,134 Google reviews; open 7 days a week.
- 30
Most-reviewed: Cellphone Guys, 234 Google reviews at 4.5★, the most of 347 ranked after Call Tools; ranked #30.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
347 Rancho Cucamonga business phone system providers are ranked here by IFR Score, from nine published factors. 171 open Saturdays and 142 open Sundays, based on posted hours. The median Google rating is 4.9★ across 347 rated IT firms.
Top 10 business phone system providers in Rancho Cucamonga 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 | Call Tools | 67 | 5.0★ (1,134) | Irvine, 32 mi away | Sat · Sun | Overall |
| 2 | LAN WAN Enterprise - IT Services In Orange County & Irvine | 64 | 5.0★ (174) | Irvine, 32 mi away | Sat · Sun · Evenings | — |
| 3 | Total Wireless | 63 | 4.9★ (99) | Fontana, 9 mi away | Sat · Sun · Evenings | — |
| 4 | Total Wireless | 61 | 5.0★ (202) | Hawthorne, 45 mi away | Sat · Sun · Evenings | — |
| 5 | One Internet America Business Internet and Telephone | 61 | 4.5★ (25) | Ontario, 3 mi away | Sat · Sun · Evenings | — |
| 6 | Total Wireless | 61 | 5.0★ (93) | Westminster, 33 mi away | Sat · Sun · Evenings | — |
| 7 | CoreSite Los Angeles Data Center (LA2) | 60 | 4.5★ (111) | Los Angeles, 37 mi away | Sat · Sun · Evenings | — |
| 8 | Tierzero Business Phones & Internet | 60 | 4.9★ (66) | Los Angeles, 38 mi away | Sat · Sun · Evenings | — |
| 9 | One Stop Telecom | Business Phone. Business Internet. Easy. | 60 | 5.0★ (75) | Upland, 3 mi away | — | — |
| 10 | SmarterHome.ai - Compare Local Internet Deals | 60 | 5.0★ (124) | Burbank, 49 mi away | Sat · Sun · Evenings | — |
The 347 best business phone system providers in Rancho Cucamonga, 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.
Scores below: based on 8 of 9 factors; recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Irvine, 32 mi away
64/100IFR ScoreRanked #2 because of its Google rating and service focus: 5.0★ from 174 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Fontana, 9 mi away
63/100IFR ScoreRanked #3 because of its Google rating and service focus: 4.9★ from 99 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Hawthorne, 45 mi away
61/100IFR ScoreRanked #4 because of its Google rating and service focus: 5.0★ from 202 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Ontario, 3 mi away
61/100IFR ScoreRanked #5 because of its Google rating and service focus: 4.5★ from 25 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Westminster, 33 mi away
61/100IFR ScoreRanked #6 because of its Google rating and service focus: 5.0★ from 93 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Los Angeles, 37 mi away
60/100IFR ScoreRanked #7 because of its Google rating and service focus: 4.5★ from 111 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Los Angeles, 38 mi away
60/100IFR ScoreRanked #8 because of its Google rating and service focus: 4.9★ from 66 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Upland, 3 mi away
60/100IFR ScoreRanked #9 because of its Google rating and service focus: 5.0★ from 75 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Burbank, 49 mi away
60/100IFR ScoreRanked #10 because of its Google rating and service focus: 5.0★ from 124 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Hacienda Heights, 21 mi away
60/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.7★ from 56 Google reviews, listed on Google as “Telecommunications service provider”.
#12 Boost Mobile
Based in Inglewood, 45 mi away
59/100IFR ScoreRanked #12 because of its Google rating and service focus: 4.7★ from 155 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Los Angeles, 43 mi away
59/100IFR ScoreRanked #13 because of its Google rating and service focus: 5.0★ from 87 Google reviews, listed on Google as “Telecommunications contractor”.
Based in Ontario, 5 mi away
59/100IFR ScoreRanked #14 because of its Google rating and service focus: 4.7★ from 11 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Riverside, 23 mi away
59/100IFR ScoreRanked #15 because of its Google rating and service focus: 4.9★ from 120 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Rowland Heights, 19 mi away
59/100IFR ScoreRanked #16 because of its Google rating and service focus: 4.5★ from 44 Google reviews, listed on Google as “Telecommunications service provider”.
#17 Total Wireless
Based in Pomona, 8 mi away
59/100IFR ScoreRanked #17 because of its Google rating and service focus: 5.0★ from 18 Google reviews, listed on Google as “Telecommunications service provider”.
#18 Boost Mobile
Based in La Puente, 21 mi away
59/100IFR ScoreRanked #18 because of its Google rating and service focus: 4.4★ from 58 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Corona, 17 mi away
59/100IFR ScoreRanked #19 because of its Google rating and service focus: 4.8★ from 16 Google reviews, listed on Google as “Telecommunications service provider”.
#20 Total Wireless
Based in Los Angeles, 39 mi away
59/100IFR ScoreRanked #20 because of its Google rating and service focus: 5.0★ from 60 Google reviews, listed on Google as “Telecommunications service provider”.
#21 LYKOS Capital
Based in El Monte, 28 mi away
59/100IFR ScoreRanked #21 because of its Google rating and service focus: 5.0★ from 106 Google reviews, listed on Google as “Telecommunications service provider”.
#22 Los Amaya
Based in Colton, 16 mi away
58/100IFR ScoreRanked #22 because of its Google rating and service focus: 3.9★ from 87 Google reviews, listed on Google as “Telecommunications service provider”.
#23 VOaaS
Based in Pasadena, 32 mi away
58/100IFR ScoreRanked #23 because of its Google rating and service focus: 5.0★ from 68 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Riverside, 16 mi away
58/100IFR ScoreRanked #24 because of its Google rating and service focus: 4.9★ from 75 Google reviews, listed on Google as “Telecommunications service provider”.
#25 Onward
Based in Rancho Cucamonga
58/100IFR ScoreRanked #25 because of its Google rating and service focus: 4.6★ from 52 Google reviews, listed on Google as “Telecommunications service provider”.
Business phone system providers ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in IFR Score order; each links to its profile. We publish the top 50 of 347 ranked business phone system providers here; the rest are on their profiles.
| Rank | Business | IFR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Total Wireless | 58 | 5.0★ (36) | 30 mi |
| 27 | Total Wireless | 58 | 5.0★ (34) | 30 mi |
| 28 | XYZies | 58 | 4.8★ (176) | 35 mi |
| 29 | Data Net Communications, Inc. | 58 | 5.0★ (68) | 35 mi |
| 30 | Cellphone Guys | 58 | 4.5★ (234) | 47 mi |
| 31 | Twintel | 58 | 4.9★ (111) | 33 mi |
| 32 | Total Wireless | 58 | 5.0★ (21) | 20 mi |
| 33 | Total Wireless | 58 | 4.4★ (17) | 8 mi |
| 34 | Waveform | 58 | 4.8★ (131) | 34 mi |
| 35 | TexStar Networks | 58 | 5.0★ (16) | 4 mi |
| 36 | Boost Mobile Store | 58 | 4.6★ (32) | 26 mi |
| 37 | iTalkBB San Gabriel Store | 57 | 4.3★ (54) | 29 mi |
| 38 | Total Wireless | 57 | 4.6★ (63) | 40 mi |
| 39 | Total Wireless | 57 | 4.8★ (31) | 30 mi |
| 40 | Total Wireless | 57 | 5.0★ (22) | 29 mi |
| 41 | Safe Haven Solutions | 57 | 5.0★ (12) | 28 mi |
| 42 | SoundCurve - Business Phone Systems | 57 | 4.8★ (25) | 17 mi |
| 43 | Triton Communication, Inc. | 57 | 4.9★ (55) | 21 mi |
| 44 | Telzio | 57 | 5.0★ (111) | 46 mi |
| 45 | Total Wireless | 57 | 3.8★ (25) | 16 mi |
| 46 | Total Wireless | 56 | 4.6★ (13) | 18 mi |
| 47 | SmarterHome.ai - Compare Local Internet Deals | 56 | 5.0★ (13) | 22 mi |
| 48 | Boost Mobile | 56 | 4.1★ (63) | 35 mi |
| 49 | Total Wireless | 56 | 5.0★ (10) | 16 mi |
| 50 | Smartology | 56 | 4.9★ (43) | 33 mi |
Also serving Rancho Cucamonga
20 more business phone system providers within 50 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 |
|---|---|---|
| Agility Integration Corporation | 4.5★ (2) | 4 mi |
| Alquest Technologies, Inc. | 5.0★ (2) | 11 mi |
| Calderon Technologies Inc. | In Rancho Cucamonga | |
| Commtel Communication | In Rancho Cucamonga | |
| Connections 87 | 5.0★ (2) | 12 mi |
| Empire Technologies Group Inc. | In Rancho Cucamonga | |
| FIBERTEL LLC | In Rancho Cucamonga | |
| Integrity Tech | Managed IT Services | 5.0★ (109) | In Rancho Cucamonga |
| IntelesysOne | 5.0★ (2) | 3 mi |
| Lenity Technology, Inc. | 4.9★ (13) | In Rancho Cucamonga |
| MC Electric dba MC Contracting | 5.0★ (2) | 9 mi |
| One Ring Networks | 5.0★ (1) | In Rancho Cucamonga |
| Onward IT | 5.0★ (13) | In Rancho Cucamonga |
| PhonePlatform.com | 5.0★ (2) | 12 mi |
| SmarterHome.ai - Compare Local Internet Deals | 5.0★ (2) | 7 mi |
| Tech 20 Solutions Inc. | In Rancho Cucamonga | |
| TNN | Managed IT Services | 4.5★ (4) | In Rancho Cucamonga |
| VectorUSA | 3.0★ (1) | In Rancho Cucamonga |
| Versa Telecom Group, Inc. | In Rancho Cucamonga | |
| VoIPCom, Inc. | In Rancho Cucamonga |
How we ranked Rancho Cucamonga business phone system providers
We scored 347 Rancho Cucamonga business phone system providers 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 Rancho Cucamonga 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 business phone system provider
- Ask whether the system is cloud-hosted or installed on site, and who maintains it.
- Check internet capacity and backup: a cloud phone system stops when your connection does.
- Ask how 911 locations are registered for each phone and for remote staff.
- Compare per-user prices on the same features (call recording, queues, integrations).
- 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 business phone system provider
- Is the price per user, and which features are extra?
- Will you port our existing numbers, and how long does it take?
- What happens to calls if our internet connection goes down?
- How are 911 locations set up for office and remote staff?
- Who do we call for support, and during which hours?
- What is the contract length, and are phones bought or leased?
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.
Business phone system providers in Rancho Cucamonga: frequently asked questions
Who is the best business phone system provider in Rancho Cucamonga?
By IFR Score, the highest-ranked business phone system provider in Rancho Cucamonga, CA is Call Tools with an IFR Score of 67/100. It has 5.0★ from 1,134 Google reviews. It is open 7 days a week. LAN WAN Enterprise - IT Services In Orange County & Irvine (#2) and Total Wireless (#3) follow. We ranked 347 business phone system providers on nine factors, last updated November 9, 2026.
How many business phone system providers are there in Rancho Cucamonga?
ITFirmsRanked ranks 347 business phone system providers serving Rancho Cucamonga, CA. 1 of them is based in Rancho Cucamonga; the rest serve it from nearby towns. Another 20 within 50 mi are listed but not ranked yet. Counts are as of November 2026.
Which business phone system providers in Rancho Cucamonga work on weekends?
171 of 347 ranked business phone system providers post Saturday hours and 142 post Sunday hours. The highest-ranked open Saturdays are Call Tools (#1), LAN WAN Enterprise - IT Services In Orange County & Irvine (#2) and Total Wireless (#3). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Rancho Cucamonga business phone system providers have?
The median Google rating among 347 rated business phone system providers in Rancho Cucamonga is 4.9★, with a median of 12 reviews. Call Tools has the most, 1,134 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank business phone system providers?
Each business phone system provider 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 business phone system providers outside Rancho Cucamonga count in this ranking?
Yes, if they are within 50 mi of the Rancho Cucamonga city center, our service radius for business phone system providers. 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 business phone system providers 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 business phone system provider do?
Business phone system providers set up and support office phone systems, mostly cloud VoIP today: numbers, desk phones, call routing, voicemail and contact-centre features.
How are business phone system providers in Rancho Cucamonga ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does business phone systems and VoIP, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
Can we keep our phone numbers if we switch providers?
In most cases yes: numbers can be ported to a new provider in the US and Canada. Keep your current service active until the port is complete, and ask the new provider to manage the port request.
What about 911 calls on a VoIP system?
Each phone needs a registered location so 911 calls go to the right place. In the US, multi-line systems must support direct 911 dialling and send dispatchable location information under federal rules (Kari’s Law and RAY BAUM’S Act). Ask the provider how they set this up.
Update log for Rancho Cucamonga
- November 2026: IFR Scores recalculated for 347 business phone system providers serving Rancho Cucamonga.
- November 2026: 1 duplicate listing merged.
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