USA Area code 748 - Colorado, CO

Q: Who called me from area code 748?

A call from area code 748 most likely originates from Colorado or elsewhere in Colorado, but caller ID spoofing means the area code alone cannot confirm who called. The only reliable way to identify the caller is to look up the full 10-digit number: a reverse phone lookup can reveal the owner's name, carrier, and whether the number carries scam reports. If the call was unwanted, report the number to the FTC at reportfraud.ftc.gov so it shows up in future lookups.

Area code 748 is a North American Numbering Plan telephone area code serving NANP telephone area codes for the U.S. state of Colorado in Colorado. It was activated in 1995 .

Sources: FCC OpenData, Wikipedia, and community-submitted reports · Updated July 18, 2026

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Local time in 748 ?

Overlay code ?

970

Time zone ?

Mountain (MT)

Activated ?

1995

Who called me from area code 748?

A call from area code 748 most likely originates from Colorado or elsewhere in Colorado - but caller ID spoofing means the area code alone cannot confirm who called. The only reliable way to identify the caller is to check the full 10-digit number:

Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
Compare it against the recently reported scam numbers in 748 below.
If the call was unwanted, report it to the FTC and use the report form on this page so other 748 residents see it.

Report a scam call from 748 Help other 748-area residents - takes 20 seconds, no signup

Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.

Should I answer a call from a 748 number? Take the 30-second quiz - 5 questions, verdict + advice

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Area codes near 748 (overlay + neighboring)

If a caller ID shows one of these codes, the call is probably still from the Colorado area or a nearby region. Click any code to see its own page.

Robocall complaints in area code 748

Live FCC data coming soon. Our automated scraper for FCC consumer-complaint statistics is in build. Once live, this section will show a real monthly trend chart of robocall complaints tied to 748 numbers, refreshed on the FCC's monthly release cadence.

Source will be FCC Consumer Complaint Data.

Recently reported scam numbers in 748

No reports for 748 yet. Be the first - use the “Report a scam call” form below to flag a number you've received. Approved reports appear here alongside FCC-recorded complaints.

How to block 748 spam calls (by carrier)

Getting repeated spam calls from 748 numbers around Colorado, Colorado? You can't legitimately block every 748 call without also missing legitimate ones from Colorado, Colorado - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.

AT&T

Download the free AT&T ActiveArmor app (iOS + Android).
Sign in with your wireless number.
Enable Fraud Blocking and Suspected Spam Warning.
To block a specific number, tap the call in your history → Block.

Verizon

Download the free Verizon Call Filter app (iOS + Android).
Sign in with your Verizon account.
Turn on Spam Filter.
To block a specific number: My Verizon → Blocks → Add Number.

T-Mobile

Download the free Scam Shield app (iOS + Android).
Enable Scam Block (blocks known scam calls silently).
Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
To block a specific number, dial #662# from your device.

All carriers

Register on the FTC's National Do-Not-Call list.
Report unwanted calls to the FCC at fcc.gov/complaints.
On iPhone: Settings → Phone → Silence Unknown Callers.
On Android: Phone app → ⋮ → Settings → Caller ID & spam.

Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.

History of the 748 area code

state of Colorado. The numbering plan area includes Aspen, Breckenridge, Durango, Estes Park, Fort Collins, Glenwood Springs, Grand Junction, Greeley, Loveland, Montrose, Silverthorne, Steamboat Springs, and Vail.

748 area code FAQ: common questions

What area code is 748?

Area code 748 is a North American Numbering Plan area code that serves NANP telephone area codes for the U.S. state of Colorado in Colorado, primarily including Colorado and surrounding communities. It was activated in 1995.

Where does area code 748 cover?

Area code 748 covers the Colorado, Colorado area.

Is 748 a real area code or a scam?

748 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 748 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.

How do I block 748 spam calls?

You cannot legitimately block an entire area code without also blocking legitimate calls from Colorado. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.

What's the overlay area code for 748?

748 shares coverage with overlay code 970. That means new phone numbers issued in the same geographic area may have either area code, and 10-digit dialing is required.

Sources

Wikipedia - Area code 748

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