CallataGuidesBusiness phone system for computer systems design services firms in District of Columbia
364 computer systems design services firms operated in District of Columbia in 2023. Where they are, how big their teams are, and what phone service costs them.
- Establishments
- 364CBP 2023
- Employees
- 7,286mid-March 2023
- Per 100k residents
- 51.8U.S. 17.1
- State rank
- 32nd of 51by count
How many computer systems design services firms operate in District of Columbia
District of Columbia had 364 computer systems design services firms in 2023, according to Census County Business Patterns (NAICS 541512, Computer Systems Design Services). They employed 7,286 people in mid-March and reported $822.7 million in annual payroll. That is the 32nd highest count among the 51 states and DC with published figures. Computer systems design services firms make up 1.5% of the 23,801 business establishments in the state.
Per 100,000 residents (2024 estimate) District of Columbia has 51.8 computer systems design services firms, 203.4% above the national rate of 17.1. The average establishment has 20.0 employees against 13.2 nationally. Payroll per employee is $112,911, 7.6% below the U.S. figure of $122,171.
| Measure | District of Columbia | United States |
|---|---|---|
| Establishments | 364 | 58,113 |
| Mid-March employees | 7,286 (moderate noise) | 766,160 |
| Annual payroll | $822,670,000 (moderate noise) | $93,602,442,000 |
| Employees per establishment | 20.0 | 13.2 |
| Payroll per employee | $112,911 | $122,171 |
| Establishments per 100,000 residents | 51.8 | 17.1 |
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.
Computer systems design services firms by metro area in District of Columbia
Census published IT services firm counts for 1 metro or micropolitan area that include part of District of Columbia. The largest is Washington, DC-VA-MD-WV, with 4,544 establishments (a multi-state area; its count covers every state it spans).
| Area | Establishments | Employees | Per 100k residents |
|---|---|---|---|
| Washington, DC-VA-MD-WV | 4,544 | 104,224 | 70.6 |
Source: Census County Business Patterns 2023; population from Census Vintage 2024 estimates.
Team sizes at computer systems design services firms in District of Columbia
52.3% of District of Columbia's computer systems design services firms with employees had fewer than five people in March 2023, compared with 74.5% nationally. 69.4% had fewer than ten. That is the size of team where a missed call usually means nobody was free, not that nobody was on staff.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 190 | 52.3% | 74.5% |
| 5–9 employees | 62 | 17.1% | 9.7% |
| 10–19 employees | 53 | 14.6% | 6.5% |
| 20–49 employees | 28 | 7.7% | 5.0% |
| 50 or more employees | 30 | 8.3% | 4.4% |
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.
Calls an IT services firm in District of Columbia has to catch
Managed IT and systems integration firms field support calls that range from a forgotten password to a server outage. Clients judge them by how quickly someone answers when something breaks. That holds for computer systems design services firms in District of Columbia as much as anywhere.
Calls an IT services firm in District of Columbia might handle in a typical week include:
- A vendor calls about a hardware order.
- A user calls to reset a password.
- The firm calls a client to schedule maintenance.
After-hours calls
Outages do not keep business hours, so routing urgent after-hours calls to an on-call technician is common.
Callata voicemail is transcribed and triaged for urgency, and business-hours routing decides where calls go once you close.
Callata vs. per-seat pricing for computer systems design services firms in District of Columbia
Computer systems design services firms in District of Columbia average 20.0 employees, so the comparison uses a 20-person team. On a per-user plan that headcount sets the bill: $499.00 a month on Ooma Office Pro or $600.00 on RingCentral RingEX Core at list price (checked September 28, 2026). On Callata the same 20 people cost $399.00 a month, less than either per-seat plan.
The annual difference against RingCentral's monthly list price comes to $2,412. Some vendors discount annual contracts; the table shows month-to-month prices.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $399.00 | $4,788.00 |
| Quo (Starter) | $19.00 per user | $380.00 | $4,560.00 |
| Nextiva (Core) | $23.00 per user | $460.00 | $5,520.00 |
| Ooma (Office Pro) | $24.95 per user | $499.00 | $5,988.00 |
| Dialpad (Standard) | $27.00 per user | $540.00 | $6,480.00 |
| RingCentral (RingEX Core) | $30.00 per user | $600.00 | $7,200.00 |
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.
Area codes in District of Columbia
District of Columbia has 2 geographic area codes in service according to NANPA. You can choose local numbers in the area codes your clients know, subject to carrier inventory, or port your current number for free.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 202 | 784 | Eastern | 1947 | 771 |
| 771 | 71 | Eastern | 2021 | 202 |
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.
How Callata works for computer systems design services firms in District of Columbia
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
If you already have a number in District of Columbia, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.
Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.
Frequently asked questions
How many computer systems design services firms are in District of Columbia?
364 in 2023, according to Census County Business Patterns. They employed 7,286 people in mid-March.
Which District of Columbia metro area has the most computer systems design services firms?
Washington, DC-VA-MD-WV, with 4,544 establishments in 2023.
What does a phone system cost a 20-person IT services firm?
$600.00 a month on RingCentral RingEX Core or $499.00 on Ooma Office Pro at month-to-month list prices (checked September 28, 2026); $399.00 on Callata ($99 a month with 5 users included, then $20 per additional user).
Do I need to register to text customers from a District of Columbia number?
Yes. US carriers require business texting from local numbers to be registered (10DLC). On Callata the registration is a one-time $49 fee, and texting turns on once it is approved.