ctc.net - Email Domain Verification & Deliverability Report

Active ISP Email Provider
Organization: Citizens Telephone Company
Mail Server: windstream.net
Verified 6 days ago

Real-time verification data for ctc.net. View MX records, SPF/DKIM/DMARC authentication, and server deliverability status.

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MX Records for ctc.net

PriorityMail ServerIP Address
10 mx01.windstream.net 129.159.105.98
SMTP Status: Responding
SMTP Banner:
220 2.0.0 mx.windstream.net ESMTP ecelerity 4.8.0.74062 r(msys-ecelerity:tags/4.8.0-ga^0) Tue, 03 Mar 2026 23:10:45 -0500

ctc.net uses windstream.net mail servers, which means emails are processed through windstream.net infrastructure with their built-in spam filtering and security controls.

Email Authentication for ctc.net

SPF Record Pass

v=spf1 ip4:162.39.147.0/24 ip4:69.168.106.0/24 include:spfc25.carrierzone.com ip4:216.55.154.0/24 include:registrarmail.net include:_spf.windstream.syn-alias.com ~all
Authorized Senders:
spfc25.carrierzone.com registrarmail.net _spf.windstream.syn-alias.com

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of ctc.net.

DMARC Record Missing

No DMARC record found for this domain.

DKIM Not Detected

DKIM detection is limited from external scanning. The domain may use DKIM with selectors not covered by our scan.

Authentication Summary: ctc.net has basic email authentication in place. Additional authentication methods would strengthen protection against spoofing and improve deliverability.

WHOIS & Domain Information

Registration Details

Domain
ctc.net
TLD
.net
Created
1995-09-03
Updated
2024-08-02
Expires
2026-09-02
Domain Age
30 years

Registrar

Name
MarkMonitor, Inc.
IANA ID
292

Registrant Contact

Organization
Windstream Communications
Location
UNITED STATES

Technical Contact

Location
UNITED STATES

Name Servers

  • ns8-auth.windstream.net
  • ns6-auth.windstream.net
  • ns7-auth.windstream.net
  • ns5-auth.windstream.net

About ctc.net

ctc.net is the email domain for Citizens Telephone Company, a regional telecommunications provider in the United States. CTC provides broadband internet, phone, and TV services to local communities, offering email accounts to its broadband subscribers through the ctc.net domain.

ctc.net supports SPF records for sender authentication. DKIM and DMARC configurations follow standard regional US telecom practices. Proper authentication is recommended for reliable delivery to ctc.net mailboxes.

The ctc.net mail servers validate recipients during SMTP sessions, rejecting invalid addresses. Standard anti-spam measures include reputation evaluation and content filtering before messages are accepted.

For delivery to ctc.net, authenticate with SPF and DKIM, maintain clean lists, and comply with CAN-SPAM. As a small regional telecom, ctc.net has a limited subscriber base where complaint rates carry significant weight.

How to Verify ctc.net Email Addresses

Need to check if an email address at ctc.net actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to ctc.net's mail servers to confirm the mailbox is real, active, and able to receive your message. No test email is ever sent, so your sender reputation stays protected.

Verify a Single ctc.net Email
Use BulkEmailChecker's free email verification tool to instantly validate any ctc.net address. You'll get a complete deliverability report including mailbox existence, catch-all detection, disposable domain flagging, and risk scoring, all in under 3 seconds.

Verify a List of ctc.net Emails in Bulk
Have a mailing list full of ctc.net addresses? Upload your CSV or TXT file to BulkEmailChecker and verify thousands of email addresses in minutes. Our bulk verification engine runs 30+ checks per address including syntax validation, DNS resolution, SMTP handshake, and spam trap detection. Clean your list before every campaign to keep bounce rates below 2% and protect your sender score. See bulk pricing.

Verify ctc.net Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates ctc.net email addresses at the point of entry, blocking invalid, disposable, and risky addresses before they enter your database. Integrate with a single API call and prevent bad data at the source.

Frequently Asked Questions

Yes, ctc.net is a valid email domain operated by Citizens Telephone Company, a regional US telecom provider offering broadband and email services to local communities.
No, ctc.net is not a disposable or temporary email service. It is a permanent ISP email domain provided by Citizens Telephone Company to its broadband subscribers.
ctc.net uses mail servers operated by Citizens Telephone Company infrastructure. The MX records direct inbound email to CTC mail gateways for filtering and delivery.
You can send marketing emails to ctc.net addresses with valid opt-in consent. Authenticate with SPF and DKIM, comply with CAN-SPAM, and maintain very low complaint rates.
You can verify a ctc.net email address using an email verification service that checks MX records and performs SMTP-level validation to confirm the mailbox is active.
The fastest and most accurate way to verify a ctc.net email address is to use BulkEmailChecker's free email verification tool. Simply enter the full email address and our system performs SMTP-level validation by connecting directly to ctc.net's mail servers. You'll get instant results showing whether the mailbox exists, is deliverable, and is safe to send to, all without sending a single email.
Yes. BulkEmailChecker uses SMTP verification to check if a ctc.net mailbox exists without ever delivering an email. Our system connects to the domain's mail server, performs an SMTP handshake, and queries the mail server to confirm whether the recipient address is valid. This process is completely invisible to the email recipient and does not affect your sender reputation.
Sending to invalid email addresses causes hard bounces, which directly damage your sender reputation. Internet Service Providers (ISPs) and email providers track your bounce rate, and if it exceeds 2%, your emails may start landing in spam folders or get blocked entirely. Verifying ctc.net addresses with BulkEmailChecker before sending prevents bounces and keeps your deliverability high.
BulkEmailChecker's bulk verification service lets you upload a CSV or TXT file containing thousands of ctc.net email addresses and verify them all at once. Each address goes through 30+ verification checks including syntax validation, DNS/MX lookup, SMTP verification, disposable domain detection, and spam trap identification. Results are typically ready within minutes and can be downloaded as a clean, verified list.
Email verification is the process of confirming that an email address is real, properly formatted, and capable of receiving messages. It matters because sending to invalid addresses causes bounces, damages your sender reputation, wastes marketing budget, and can get your sending IP blacklisted. BulkEmailChecker verifies addresses at the SMTP level, the most accurate method available, ensuring your emails reach real people.
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. When you send an email, your mail server looks up the recipient domain's MX records to find where to deliver the message. If a domain has no MX records, it cannot receive email. BulkEmailChecker checks MX records as part of every verification to confirm the domain is configured for email delivery.
A catch-all (or accept-all) domain is configured to accept email sent to any address at that domain, regardless of whether the specific mailbox exists. This makes it harder to verify individual addresses because the server always responds positively. BulkEmailChecker detects catch-all configurations and flags them in verification results so you can make informed decisions about sending to those addresses.
Yes. BulkEmailChecker offers a real-time email verification API that you can integrate into signup forms, CRM systems, lead capture tools, and any application that collects email addresses. The API validates addresses at the point of entry, blocking invalid, disposable, and risky emails before they enter your database. Integration takes just a single API call with response times under 3 seconds.

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