# How to create multiple subdomains **URL:** \ **Category:** Help\ **Created:** [January 28, 2022, 1:23am UTC](https://community.letsencrypt.org/t/how-to-create-multiple-subdomains/170751 "2022-01-28T01:23:04Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![John\_Betong](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/john_betong/32/5313_2.png) [@John\_Betong](https://community.letsencrypt.org/u/John_Betong)\ **Post date:** [January 28, 2022, 1:23am UTC](https://community.letsencrypt.org/t/how-to-create-multiple-subdomains/170751/1 "2022-01-28T01:23:05Z")
Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. [crt.sh | example.com](https://crt.sh/?q=example.com)), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help. > **Domain and hardware details** > > My domain is: jb-python.tk > > I ran this command: > See **Notes** below > > It produced this output: > See **Notes** below > > My web server is (include version): > Apache/2.4.48 (Ubuntu) > Server built: 2022-01-05T14:29:15 > > The operating system my web server runs on is (include version): > Ubuntu 21.10 > > My hosting provider, if applicable, is: > Contabo > > I can login to a root shell on my machine (yes or no, or I don't know): > Yes > > I'm using a control panel to manage my site (no, or provide the name and version of the control panel): > No > > The version of my client is (e.g. output of `certbot --version` or `certbot-auto --version` if you're using Certbot): > certbot 1.22.0 // ========= Notes ========= > [@FAILED - Renew & replace the certificate (may be subject to CA rate limits)](https://community.letsencrypt.org/t/failed-renew-replace-the-certificate-may-be-subject-to-ca-rate-limits/170311): > > M… This above _ **unresolved** _ Topic has made me be very careful in trying to add multiple subdomains to the _ **Sandbox** _ domain in case I exceed the CA rate limits… and get another domain locked out for 7 days. The jb-python.tk domain is a sandbox that I would like to add multiple subdomains before attempting to add subdomains onto the another locked out domains. I blindly followed a post that said just do this and suffering the consequences of losing about a dozen domains. I would be grateful for the exact procedure to add multiple subdomains to the existing sandbox. Also if I successfully add ten subdomains how long before I can add another two subdomains. As mentioned please, please only post tried & trusted solutions and also any limits of which I should be aware. ---
**Author:** ![MikeMcQ](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/mikemcq/32/52772_2.png) [@MikeMcQ](https://community.letsencrypt.org/u/MikeMcQ)\ **Post date:** [January 28, 2022, 4:01am UTC](https://community.letsencrypt.org/t/how-to-create-multiple-subdomains/170751/2 "2022-01-28T04:01:42Z")
> [@John\_Betong](#): > > any limits of which I should be aware There is no point in restating those here. They are all described [on the Rate Limits page](https://letsencrypt.org/docs/rate-limits/) As for adding names and certs, I recommend waiting until you resolve your prior problem. Your Apache config is in an odd state and trying to "muck about" before it is clean is likely to create a more challenging problem. The "exact procedure" you want will probably become clear as that resolves. ---
**Author:** ![schoen](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/schoen/32/79_2.png) [@schoen](https://community.letsencrypt.org/u/schoen)\ **Post date:** [January 28, 2022, 4:05am UTC](https://community.letsencrypt.org/t/how-to-create-multiple-subdomains/170751/3 "2022-01-28T04:05:55Z")
Hi @John_Betong, None of your prior issuance activity looks like it would have come anywhere close to a Let's Encrypt rate limit: > **[crt.sh | %.jb-python.tk](https://crt.sh/?q=%25.jb-python.tk)** > > Free CT Log Certificate Search Tool from Sectigo (formerly Comodo CA) You can see all of the details of the Let's Encrypt rate limits at > **[Rate Limits - Let's Encrypt](https://letsencrypt.org/docs/rate-limits/)** > > Let’s Encrypt provides rate limits to ensure fair usage by as many people as possible. We believe these rate limits are high enough to work for most people by default. We’ve also designed them so renewing a certificate almost never hits a... > The main limit is **Certificates per Registered Domain** (50 per week). A registered domain is, generally speaking, the part of the domain you purchased from your domain name registrar. For instance, in the name `www.example.com` , the registered domain is `example.com` . In `new.blog.example.co.uk` , the registered domain is `example.co.uk` . We use the [Public Suffix List](https://publicsuffix.org) to calculate the registered domain. Exceeding the Certificates Per Registered Domain limit is reported with the error message `too many certificates already issued` , possibly with additional details. When you re-issue with different subdomains, you will usually be able to do this up to 49 times per week, for a total of 50 certificates per week mentioning a given registered name. If this isn't an automated process and you don't have more than 49 changes per week in your certificate coverage, you should be fine. If there's a particular issuance strategy that you'd like to ask for clarification about, feel free to ask with more specificity. > [@John\_Betong](#): > > I blindly followed a post that said just do this and suffering the consequences of losing about a dozen domains. You may want to look closely at the rate limit documentation, because one possibility is that there is (or was) an issuance strategy that you could have used to avoid the rate limits—maybe even at the point when you first started getting rate limit errors. For example, if you reissue a certificate 50 times with various changes but all 50 mention the same registered name, you will be rate limited, but if you wanted to add other names that are not subdomains of that name, you would still be allowed to do that in separate certificates. ---
**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\ **Post date:** [February 27, 2022, 4:06am UTC](https://community.letsencrypt.org/t/how-to-create-multiple-subdomains/170751/4 "2022-02-27T04:06:22Z")
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