Who called you?
(603) 506-4666
(603) 506-4666 is a wireless (mobile) number from Manchester, NH on a prefix assigned to AT&T Mobility (New Cingular Wireless PCS). Consumers have filed 2 complaints about it: 2 with the FTC's Do Not Call Registry, most recently on 2026-08-25.
Reported this month — 2 FTC complaints in the last 30 days, most recently 22 days ago, for unwanted calls.
Who called me from (603) 506-4666?
Carrier & location
- Type
- Wireless (mobile)
- Assigned carrier
- AT&T Mobility (New Cingular Wireless PCS)
- Rate center
- Manchester, NH
- Prefix 603-506
- assigned 2018-10-29, pooled block
- Area code
- 603 — New Hampshire
- Time zone
- E
This prefix is assigned to a wireless carrier, so the number is a mobile line. Caller ID for mobile numbers is frequently spoofed by robocallers. Carrier assignment shows who the prefix was allocated to; numbers can be ported, and caller ID can be spoofed.
Complaint history
- FTC Do Not Call reports
- 22026-08-25
- Community reports
- 0
FTC Do Not Call complaints (unverified consumer reports).
Did this number call you? What was it?
What (603) 506-4666 was reported for
2 consumers reported this number to the FTC's National Do Not Call Registry on 2026-08-25. Source: FTC Do Not Call complaints (unverified consumer reports).
Reported this month — 2 FTC complaints in the last 30 days, most recently 22 days ago, for unwanted calls.
Reported for
The subject each consumer chose when filing. “Impostor” means the caller claimed to be a government agency, a business, or a relative.
- Other / unspecified2 (100%)
Where it was reported
The state the consumer filed from — where the call landed, not where it originated.
- WA2 (100%)
Recent FTC reports naming (603) 506-4666
The most recent Do Not Call complaints, as filed: the date the consumer reported it, when they said the call happened, what it was about, and the city and state they filed from.
Reported in the last 7 days in area code 603 (New Hampshire)
Other 603 numbers consumers reported to the FTC this week — useful when a campaign is rotating through an area code.
- (603) 316-34652 this week · Impostor (government, business, family)
- (603) 570-44742 this week · Dropped call / no message
- (603) 864-64882 this week · Impostor (government, business, family)
- (603) 257-90352 this week · Dropped call / no message
- (603) 257-90741 this week · Impostor (government, business, family)
- (603) 259-11991 this week · Impostor (government, business, family)
- (603) 263-56501 this week · No subject given
- (603) 333-14091 this week · Debt reduction
- (603) 346-98721 this week · Debt reduction
- (603) 441-50651 this week · Dropped call / no message
Source: FTC Do Not Call Reported Calls data, published every weekday. These are unverified consumer reports — they record what someone said about a call, not a finding against the number's owner. Caller ID is routinely spoofed, so a report can describe a call that only displayed this number. No reporter is identified beyond city and state.
Is (603) 506-4666 a scam? Community reports
No community reports for (603) 506-4666 yet. If this number called you, you're likely the first — leave a report below and help the next person who searches it.
Other reported numbers starting (603) 506
Robocall campaigns often rotate through a block of numbers on the same prefix — if several neighbors have complaints too, that's campaign behavior.
What to do next
Block it on Android or iPhone, turn on your carrier's free filtering, and report the call to the FCC and FTC — those complaints are the public record this page is built from.
Related
FAQs about (603) 506-4666
Who called me from (603) 506-4666?
(603) 506-4666 is a wireless (mobile) number on a prefix assigned to AT&T Mobility (New Cingular Wireless PCS), based in Manchester, NH. Consumers have filed 2 complaints about it — 2 with the FTC's Do Not Call Registry.
Is (603) 506-4666 a scam or robocall?
2 consumers reported (603) 506-4666 to the FTC. 2 of the reports were filed in the last 30 days, so the campaign is current. Complaints are a strong signal, not proof — never share personal or payment information with an unsolicited caller.
Should I call (603) 506-4666 back?
Reports about this number are current — the most recent FTC complaint was filed 2026-08-25 — so calling back is not advisable. As a general rule, only return a call you were expecting: a caller with legitimate business will leave a voicemail.
WhoCalledLookup is not a consumer reporting agency (FCRA). Community reports are user opinions, not statements of fact by this site; FTC and FCC complaints are unverified consumer submissions. Own this number? Dispute a listing.