HTTP Status Codes Explained

This can be one of those terms that leaves a blank look upon the face of any of our accountancy clients that we mention this to, but actually it’s quite a simple thing to understand. Arm yourself with the knowledge of HTTP codes and their meaning and you can keep your website ticking over nicely.

HTTP stands for Hypertext Transfer Protocol and simply means a method for transmitting webpage data across the internet using a server-client model. The “server” is generally a web-host that is running web server software whereas the “client” is a personal device such as a mobile, a laptop or a home pc.

Every time you go to access a website, the client talks to the web server to establish accessibility. It does this via your web browser and the web server responds by giving an HTTP status code. If the access is given, you might not notice the HTTP code. It’s usually noticeable when there is an error and the connection in denied.

A 404 error is a common HTTP code that you might be familiar with. It’s the code you are presented with if a page no longer exists because it has been removed or the URL has changed. The user will be displayed a page from that website but denying access to any content. You might already know that these are fixable by putting a redirect in place, redirecting that page either to its new location or to a page with similar content.

HTTP Status Code Categories.

HTTP codes are categorised into 5 different areas. Within these categories are a vast range of different codes for different responses. The categories are:

100-199 – information responses

200-299 – successful responses, i.e. 200 status

300-399 – redirected URLs, i.e. 301 and 302 redirects

400-499 – client errors, i.e. 404 errors

500-599 – server errors, i.e. 500 errors

So What HTTP Status Codes Exist Within These?

100 Continue

101 Switching Protocol

102 Processing

103 Early Hints

200 OK

GET: The resource has been fetched and is transmitted in the message body.

HEAD: The entity headers are in the message body.

PUT or POST: The resource describing the result of the action is transmitted in the message body.

TRACE: The message body contains the request message as received by the server

201 Created

202 Accepted

203 Non-Authoritative Information

204 No Content

205 Reset Content

206 Partial Content

207 Multi-Status

208 Already Reported

226 IM Used

300 Multiple Choice

301 Moved Permanently

302 Found

303 See Other

304 Not Modified

305 Use Proxy

306 unused

307 Temporary Redirect

308 Permanent Redirect

400 Bad Request

401 Unauthorized

402 Payment Required

403 Forbidden

404 Not Found

405 Method Not Allowed

406 Not Acceptable

407 Proxy Authentication Required

408 Request Timeout

409 Conflict

410 Gone

411 Length Required

412 Precondition Failed

413 Payload Too Large

414 URI Too Long

415 Unsupported Media Type

416 Requested Range Not Satisfiable

417 Expectation Failed

418 I’m a teapot

421 Misdirected Request

422 Unprocessable Entity

423 Locked

424 Failed Dependency

425 Too Early

426 Upgrade Required

428 Precondition Required

429 Too Many Requests

431 Request Header Fields Too Large

451 Unavailable For Legal Reasons

500 Internal Server Error

501 Not Implemented

502 Bad Gateway

503 Service Unavailable

504 Gateway Timeout

505 HTTP Version Not Supported

506 Variant Also Negotiates

507 Insufficient Storage

508 Loop Detected

510 Not Extended

511 Network Authentication Required


For further help with HTTP status codes and your website contact us here at Whitefish Marketing. We are a Kent based digital marketing agency who specialise in building and marketing for accountancy websites, offering a range of services from website designPPCSEOemail marketingcontent marketing and social media management. For further information on how they can help your business, contact them on 01303 720 288 or head to

1 Select a Template

Please select one of our pre-designed templates. This can be changed later on.