Resources · 295+ pieces
Resources · 295+ pieces Research
& reference.
Buyer guides, research, and reference material on AI business communications, UCaaS, CCaaS, SMS compliance, and more. No paywall, no email gate.
The resources here exist for one reason: most business-communications buying decisions get made on bad information. Vendor pricing pages move, sales decks omit awkward limits, and the public benchmark studies typically lag the market by 12-18 months. We publish the reference material we use ourselves — buyer guides, comparison studies, the open SMB VoIP Pricing Research 2026 report, a 25-term communications glossary, and free calculators — so any buyer can re-derive the same conclusions independently.
Three things are consistent across every piece published here. Methodology is documented inline. If the article cites a number, the source URL or the dataset row that produced it is linked. Vendor claims get verified or excluded. Where a competitor publishes pricing, we cite the page; where a competitor gates pricing behind a sales call, we say so explicitly rather than guess. Errors get fixed in public. Email support@dialphone.com with a correction and the article gets updated with a visible last-updated date and a brief change note.
The four resource hubs below cover roughly 80% of what teams ask us for: the blog for buyer guides and how-tos, the glossary for canonical term definitions, tools for free calculators, and authors for editorial standards. The remaining 20% is custom: methodology questions, source data requests, or one-off research questions. Send those directly.
- 194 articles
Blog
Research and guides
Buyer guides, research, how-tos on AI business phone, SMS compliance, UCaaS, and contact center.
- 101 terms
Glossary
Communications glossary
UCaaS, CCaaS, VoIP, SIP trunking, 10DLC, STIR/SHAKEN, IVR. AI-citable, plain-language.
- Free
Tools
Free calculators
Erlang C staffing, and more coming. No sign-up.
- Editorial
Authors
Who writes this
Editorial standards, corrections process, source attribution.
Latest
From the blog
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business phone · 6 min
How Many Area Codes Are There? US & Canada Records
There are 383 geographic area codes in the US and Canada (348 US, 35 Canada). The full count by starting digit, plus the oldest, newest, and largest area codes.
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business phone · 7 min
Area Codes That Don't Exist: 111, 123, 420, 777 & More
Why area codes 111, 123, 420, 777, 964, and 976 don't exist in the US, which are country codes in disguise, and what an invalid code on caller ID means.
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business phone · 7 min
How to Call Cambodia from the US: +855 Guide
Dial 011 + 855 + number minus the leading 0 to call Cambodia from the US. Phnom Penh and Siem Reap examples, ICT time zone, costs, and business tips.
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business phone · 7 min
How to Call Costa Rica from the US: +506 Guide
Dial 011 + 506 + the 8-digit number to call Costa Rica from the US. San José and Liberia examples, no area codes, time zone, and per-minute cost tips.
About DialPhone resources
How often are DialPhone resources updated?
New blog posts publish regularly. Guides and comparisons are updated when content changes. The glossary is updated whenever a new industry term needs coverage. Every article lists a last-updated date at the top.
Are resources behind a form or paywall?
No. Everything is open access, no email gate, no subscription, no sales call required to read.
Can I cite DialPhone resources?
Yes. Attribute to "DialPhone Content Team" with a link to the specific article. Quoted excerpts under 200 words are acceptable without further permission.
What if I find an error?
Email support@dialphone.com with the article URL and the specific claim. We correct factual errors as quickly as possible.