国際電話ブログ
国際電話のためのガイド・正直な比較・節約のコツ。回りくどい話は抜きで、実践的なアドバイスだけ。
How to Call Venezuela from the US for $0.04/Min (2026)
Everything you need to call Venezuela from the US: the +58 dialing format, Caracas and city area codes, the 0412/0414/0416/0424/0426 mobile prefixes, real per-minute rates, and why landlines are cheaper than mobiles.
How to Call Guatemala from the US for $0.24/Min (2026)
Everything you need to call Guatemala from the US: the +502 dialing format, why there are no area codes, how to tell a landline (2/6/7) from a mobile (3/4/5), real per-minute rates, and the cheapest ways to call — compared.
How to Call El Salvador from the US for $0.36/Min (2026)
Everything you need to call El Salvador from the US: the +503 dialing format, why there are no area codes, real per-minute rates ($0.36/min to mobiles, $0.48/min to landlines), and why mobiles cost less than landlines.
How to Call Honduras from the US (2026)
Everything you need to call Honduras from the US: the +504 dialing format, why there are no area codes, how to tell a landline from a mobile, real per-minute rates, and the cheapest ways to reach family in Tegucigalpa or San Pedro Sula.
How to Call Ecuador from the US from $0.43/Min (2026)
Everything you need to call Ecuador from the US: the +593 dialing format, why you drop the leading 0, the Quito (2) and Guayaquil (4) area codes, real per-minute rates, and the cheapest methods compared.
How to Call Spain from the US for $0.11/Min (2026)
Everything you need to call Spain from the US: the +34 dialing format, why Spanish numbers have no area code, real per-minute rates, and how mobiles (6/7) differ from landlines (8/9).
How to Call Colombia from the US for $0.03/Min (2026)
Everything you need to call Colombia from the US: the +57 dialing format, the 2021 10-digit landline change, real per-minute rates, and why mobiles are cheaper than landlines.
How to Call the Dominican Republic from the US for $0.10/Min (2026)
The Dominican Republic uses +1, so it looks like a domestic US call — but it is not free. This guide covers the 809/829/849 area codes, why your carrier still bills it as international, and the cheapest ways to call, compared.
How to Call Japan from the US Cheaply (2026 Guide)
Complete guide to making affordable calls to Japan. Compare rates, methods, and find the cheapest option for landlines and mobiles.
Google Voice Alternatives for International Calling
Google Voice has limitations for international calls. Discover better alternatives with lower rates and more features.
ブラウザで国際電話がかけられる仕組み（やさしい解説）
WebRTC・PSTN・SIP——これは何のこと？ ブラウザ通話の仕組みを、専門用語なしで噛み砕いて解説します。
国際電話アプリ比較：WhatsApp vs Viber vs TwinPhone
WhatsAppとViberはアプリ同士の通話には最適ですが、実際の電話番号にかけるなら？ その違いを比較します。
Virtual Phone Numbers: Everything You Need to Know
What are virtual numbers, how do they work, and why should you get one? A complete guide for travelers and businesses.
How to Call the UK from the US for Pennies (2026)
Calling the UK does not have to cost a fortune. This guide breaks down five methods with real pricing, including the difference between UK landlines and mobiles.
How to Call Mexico from the US for $0.04/Min (2026)
Everything you need to know about calling Mexico from the US: real rates, dialing formats, the 2019 number change, and the cheapest methods compared.
Call Germany from the US for $0.03/Min (2026)
Complete guide to calling Germany from the US. Compare all methods, understand the landline vs mobile price gap, and find the cheapest option.
Best VoIP for International Sales Teams in 2026
Most VoIP platforms charge $20-30 per seat per month. Here's why pay-as-you-go international calling saves sales teams thousands and closes more deals.
2026年で最も安い国際電話アプリ
8つの通話サービスの料金を、人気の相手先10か国で比較しました。実際の数字で、どのアプリが本当に最安かを示します——宣伝文句ではなく。
Call China from the US for $0.03/Min (2026 Guide)
Calling China from the US is cheap if you know what to use. Landlines and mobiles both cost $0.03/min with TwinPhone. Here's how to do it right.
How to Call South Korea from the US — Best Options
South Korea calls cost $0.03/min to landlines and $0.04/min to mobiles with TwinPhone. Here's how to dial correctly and avoid carrier rip-offs.
How to Call Nigeria from the US Cheaply (2026)
Call Nigeria from the US for as low as $0.04/min to landlines and $0.06/min to mobiles. per-minute billing, no contracts, no hidden fees.
Call Australia from the US for $0.03/Min (2026)
Call Australia from the US for $0.03/min to landlines and $0.04/min to mobiles. per-minute billing, encrypted calls, no contracts or apps.
How to Get a Virtual Phone Number in Another Country
A step-by-step guide to getting a virtual phone number in another country. Build local presence, protect your privacy, and save on international calls.
International Calling for Small Business — Guide
Small businesses overpay for international calls by 5-10x. This guide breaks down the cheapest options, compares platforms, and shows how to cut costs without sacrificing quality.
国際電話 完全ガイド（2026年版）
2026年に国際電話をかけるために知っておくべきすべて——通話の経路と課金の仕組みから、サービスの選び方、よくある落とし穴の回避、そして1通話あたり最大90%の節約まで。
VoIP Buyer's Guide 2026 — Everything to Know
The definitive buyer's guide to VoIP in 2026. Compare providers, pricing models, features, and security standards so you pick the right service on day one.
無料の国際電話：2026年に本当はどういう意味か
海外の誰かの電話に、本当に無料でかけられるのか？ 「無料通話」アプリの仕組み、最後に誰が払っているのか、そして従量課金サービスのほうが理にかなう場面を、正直に解説します。
How to Call Jet2 Customer Service from Abroad (Without Roaming Fees)
Stuck abroad and need to reach Jet2? Real customer-service numbers for every country, opening hours, and the no-app way to call without roaming charges.
How to Call Apple Support from Any Country (Without Roaming)
Apple Support phone numbers for every country, hold times, and how to avoid roaming charges by calling from your browser. Updated 2026.
How to Reach Ryanair Customer Service from Abroad (Real Numbers, 2026)
Ryanair customer service phone numbers by country. Hold times, operating hours, and how to avoid €1.50/min roaming charges with a browser-based dialer.
How to Reach Movistar Customer Service (Including from Abroad)
Movistar's 1004 short number only works from Spanish lines inside Spain. Here is the number Movistar publishes for calls from abroad, what the call really costs on roaming versus a browser dialer, and how to get through to an agent faster.
Claro Customer Service from Spain: Verified Numbers for Colombia, Perú and Ecuador
Claro's *611 and 123 short codes don't work from Spain. Here are the international support numbers verified on Claro's official websites for Colombia, Perú and Ecuador — and how to call them from your browser, from $0.02 a minute to Colombia and Perú.
Cheap International Calls from Spain: the 2026 Guide
The 2026 guide to cheap international calls from Spain: real per-minute prices to Colombia, Venezuela, Peru, Argentina and Romania, why carrier rates stay high, and how to call abroad from your browser for a fraction of the price.
Cheap International Calls from Germany: the 2026 Guide
What international calls really cost from Germany in 2026 — carrier rates, the EU price cap, what is left of Call-by-Call, and how browser calling from $0.02/min compares on the seven most-called routes.
How to Call Colombia from the USA in 2026: Rates and Dialing Codes Guide
Learn how to call Colombia from the United States using the +57 code with rates of $0.02 per minute. Updated guide for dialing Claro, Movistar, and Tigo numbers.
How to Call Colombia from the United States in 2026: Guide and Rates
Learn how to call Colombia from the United States affordably and directly. Find out about the $0.02 per minute rates and the +57 dialing format.
How to Call Pakistan From the US: Rates & Steps (2026 Guide)
Learn how to dial Pakistan from the US using the country code +92, with steps for mobile numbers and real pricing.