diff --git a/README.md b/README.md
index 58a44772..8932fac9 100644
--- a/README.md
+++ b/README.md
@@ -533,6 +533,7 @@ API | Description | Auth | HTTPS | CORS |
 | [MY IP](https://www.myip.com/api-docs/) | Get IP address information | No | Yes | Unknown |
 | [Nationalize.io](https://nationalize.io) | Estimate the nationality of a first name | No | Yes | Yes |
 | [Netlify](https://docs.netlify.com/api/get-started/) | Netlify is a hosting service for the programmable web | `OAuth` | Yes | Unknown |
+| [NetworkCalc](https://networkcalc.com/api/docs) | Network calculators, including subnets, DNS, binary, and security tools | No | Yes | Yes |
 | [npm Registry](https://github.com/npm/registry/blob/master/docs/REGISTRY-API.md) | Query information about your favorite Node.js libraries programatically | No | Yes | Unknown |
 | [OneSignal](https://documentation.onesignal.com/docs/onesignal-api) | Self-serve customer engagement solution for Push Notifications, Email, SMS & In-App | `apiKey` | Yes | Unknown |
 | [OOPSpam](https://oopspam.com/) | Multiple spam filtering service | No | Yes | Yes |