CallataGuidesBusiness phone system for advertising agencies in Riverside, CA
Advertising agencies in the Riverside-San Bernardino-Ontario, CA metro area: 105 establishments in 2023, the local area codes, and what phone service costs a 5-person team.
- Establishments
- 105CBP 2023
- Employees
- 506mid-March 2023
- Per 100k residents
- 2.2U.S. 4.6
- Rank
- 29th of 351areas by count
How many advertising agencies are in Riverside, CA?
The Census Bureau's 2023 County Business Patterns lists 105 establishments classified as Advertising Agencies (NAICS 541810) in the Riverside-San Bernardino-Ontario, CA metro area. They employed 506 people in mid-March and paid $24.2 million in annual payroll. By establishment count the area is 29th out of 351 areas with published figures for advertising agencies.
Measured against its 4.7 million residents (2024 estimate), the area has 2.2 advertising agencies per 100,000 people; the U.S. rate is 4.6, so Riverside, CA is 51.5% below the national figure. The average establishment here has 4.8 employees, compared with 12.9 nationally. Payroll per employee comes to $47,808, 55.3% below the national $106,841.
| Measure | Riverside, CA | California | United States |
|---|---|---|---|
| Establishments | 105 | 2,462 | 15,512 |
| Mid-March employees | 506 (moderate noise) | 32,122 | 200,465 |
| Annual payroll | $24,191,000 | $3,785,687,000 | $21,417,972,000 |
| Employees per establishment | 4.8 | 13.0 | 12.9 |
| Payroll per employee | $47,808 | $117,853 | $106,841 |
| Establishments per 100,000 residents | 2.2 | 6.2 | 4.6 |
Census County Business Patterns 2023 (mid-March employment; annual payroll). Employees and payroll flagged high-noise are shown but not used in the text. Residents: Census Vintage 2024 estimates.
How big advertising agencies in Riverside, CA are
Of the advertising agencies in Riverside, CA that had employees in March 2023, 79.4% had fewer than five (the U.S. share is 68.2%). 93.1% had fewer than ten. For a business of a few people, phone coverage is a staffing question as much as a technology one: someone has to be free to pick up, or the call needs somewhere sensible to go.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 81 | 79.4% | 68.2% |
| 5–9 employees | 14 | 13.7% | 12.0% |
| 10–19 employees | 7 | 6.9% | 8.4% |
| 20–49 employees | not published | — | 6.4% |
| 50 or more employees | 0 | 0.0% | 5.0% |
Employment-size classes count establishments by mid-March 2023 employment. Establishments with no March employees are excluded from the size classes, so shares are of establishments with employees. Source: Census County Business Patterns 2023.
What advertising agencies in Riverside, CA use the phone for
Agencies manage many client relationships at once, and clients expect to reach their account team quickly. Recording and summarizing calls helps teams keep track of approvals and requests.
Calls an advertising agency in Riverside, CA might handle in a typical week include:
- A media rep calls about an ad placement.
- A client calls to change a campaign budget.
- The agency calls a client to review creative.
What advertising agencies text about
Agencies text approvals and schedule changes.
Because carriers require registration for business texting from local numbers, Callata files a 10DLC registration for a one-time $49; after approval, anyone on the team can reply from the business number.
What a phone system costs an advertising agency in Riverside, CA
The average advertising agency in Riverside, CA has 4.8 employees, so a 5-person team is a reasonable benchmark. Priced per seat, 5 users would run $150.00 a month on RingCentral RingEX Core and $124.75 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). Callata comes to $99.00 a month for 5 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $612 less than RingCentral for an advertising agency in Riverside, CA of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $99.00 | $1,188.00 |
| Quo (Starter) | $19.00 per user | $95.00 | $1,140.00 |
| Nextiva (Core) | $23.00 per user | $115.00 | $1,380.00 |
| Ooma (Office Pro) | $24.95 per user | $124.75 | $1,497.00 |
| Dialpad (Standard) | $27.00 per user | $135.00 | $1,620.00 |
| RingCentral (RingEX Core) | $30.00 per user | $150.00 | $1,800.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Local area codes for advertising agencies in Riverside, CA
NANPA records place the exchanges of the area's named cities and towns in 5 area codes. 909 has the most, with 486 of 1,266 exchanges (38%). A local number lets clients in Riverside, CA call without dialing out of area. Callata includes up to 3 local numbers, and which numbers are open in an area code depends on carrier inventory when you choose.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 909 | 486 | Pacific | 1992 | 840 |
| 951 | 407 | Pacific | 2004 | none |
| 760 | 209 | Pacific | 1997 | 442 |
| 442 | 106 | Pacific | 2009 | 760 |
| 840 | 58 | Pacific | 2021 | 909 |
Exchanges are NANPA-assigned central office codes (NPA-NXX) in the rate centers matched to the area's named places. Source: NANPA utilized code and NPA reports.
What advertising agencies in Riverside, CA get with Callata
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
Porting a number you already use in Riverside, CA is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.
AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.
Frequently asked questions
How many advertising agencies are there in Riverside, CA?
Census County Business Patterns counted 105 advertising agencies in the Riverside-San Bernardino-Ontario, CA metro area in 2023. They employed 506 people in mid-March.
What does a business phone system cost for a 5-person advertising agency?
At month-to-month list prices checked September 28, 2026, 5 users cost $150.00 a month on RingCentral RingEX Core and $124.75 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $99.00.
What area code should an advertising agency in Riverside, CA use?
Area code 909 has the most assigned exchanges among the area's named places, followed by 951 and 760. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for an advertising agency?
Yes. Callata's optional AI agents can answer when the team is busy or closed, take a message, text, email or transfer the call. They disclose that they are AI and are billed from prepaid AI minutes at $0.25 per minute.