HTTP Status Codes Cheat Sheet: Handling 200/301/404/410

Every HTTP status code a URL returns tells crawlers and browsers what state that page is in right now. Use the wrong code and you get messy indexing at best, lost authority at worst. 200, 301, 404, and 410 are the four types you most need to get clear.

Status codes connect to redirects and dead link cleanup — the systematic treatment is in the technical SEO handbook. This article gives a quick reference and handling advice.

Here’s the bottom line: 200 means normal and crawlable, the state of most pages. 301 means permanent migration, transferring old address authority to the new one. 404 means not found, for temporary or unexpected absence. 410 means deleted, letting engines let go faster.

200: normal and crawlable

200 is the most ideal status code and should be the mainstream — it means the page exists and is normally accessible. Search engines seeing 200 will crawl, evaluate, and index normally. Most valuable pages on your site should be 200. If a page that should be normal returns a different code, configuration or links have a problem — trace it from the source.

One hidden trap is “soft 200”: the page content says “not found” but HTTP returns 200. Engines treat it as a normal page and index it, creating garbage index entries. Make sure “content missing” pages return a real 4xx rather than disguising with 200. Status codes need to honestly reflect reality so engines can decide correctly, avoid polluting the index, and not waste crawl quota.

301: permanent migration

301 means “this address has permanently moved to another one.” Search engines merge most of the old address’s authority and historical signals into the new address, gradually replacing the old one in the index. It’s the standard practice for address changes and content merges, with the cleanest authority transition — also a common tool for consolidating old links in flat site architecture.

The key to using 301 is “complete, accurate, single hop”: the old address jumps directly to the correct new one — don’t jump to the wrong place, don’t chain. During redesign migrations especially, all old links need full 301 coverage, otherwise traffic and authority cliff. It differs from canonical: 301 is a real redirect that takes users along too, suitable for definitively retired old addresses, solving both signals and experience.

404 and 410: content is gone

404 means “the server can’t find this resource,” for temporarily missing content, mistyped links, or things not yet ready. It’s a neutral “road closed” — engines gradually lower that URL’s crawl and indexing priority. For genuinely unexpected dead links, 404 is the reasonable response; paired with a friendly 404 page, it can also keep visitors, so neither experience nor signals collapse.

410 is more explicit than 404: it declares “this resource has been permanently deleted,” letting engines remove the URL from the index faster without coming back repeatedly to confirm like 404. It suits cases where you know content will never return and want to accelerate cleanup. Both are used for “gone” — the difference is intent clarity: 410 is the clean “don’t come back” declaration, more efficient cleanup, and aligned with crawl budget optimization: releasing budget to live pages faster.

Other 3xx/5xx to watch

Beyond 301, 302 is a temporary redirect (doesn’t pass authority by default), only for short-term switches; 303/307/308 are more precise temporary/permanent semantics, but for daily use 301/302 suffice. 5xx (like 500, 503) means server errors — if frequent, engines see the site as unstable, lower crawling, or even temporarily drop rankings. Fix these fast, and during maintenance use 503 to clearly say “temporarily unavailable.”

Redirect chains (3xx chains) also deserve caution: each extra hop adds latency and loses authority, and crawlers may give up midway. Ideal is a single 301 hop. Status codes aren’t isolated numbers — they’re the health barometer of the entire access path. Any category with abnormally high proportion is worth investigating; don’t wait until indexing or ranking shifts to look back at logs.

Status codes and indexing

Search engines decide “crawl or not, index or not, give authority to whom” based on status codes: 200 gets indexed, 301 gets merged, 404/410 get gradually removed. So status codes directly shape index composition. If a page that should be 200 mistakenly returns 404, it gets slowly removed; if a page that should be 410 returns 200, it’s kept as a live page — wrong status codes equal sending wrong instructions to engines.

When managing, treat “correct status codes” as a hard metric: periodically scan return codes for all site URLs, confirm live pages are all 200, migrations all 301, dead pages all 404/410, no unexpected 5xx. This status code list is the foundation of site health — more fundamental than chasing rankings. With a solid foundation, indexing and rankings become predictable, and there are fewer mysterious “why won’t it index” phenomena.

Common misuses

Misuse one: using 302 where 301 is needed — authority doesn’t transfer, new page can’t rise. Misuse two: dead pages returning 200 (soft 404) — polluting the index. Misuse three: migration only changes content without 301 — old addresses all 404, losing authority. Misuse four: frequent 5xx unfixed — crawling gets reduced. Each one means “the signal transfer that should happen” doesn’t, accumulating into ranking damage, and it’s hidden and hard to trace.

The correct posture is “intent matches code”: permanent moves use 301, temporary use 302, gone use 404/410, errors use 5xx and fix fast. Treat status codes as honest language to engines — clearly say the current state of each address, and it can handle indexing and authority correctly. This is the most basic and most easily overlooked part of technical SEO. Done well, it avoids a lot of later trouble.

Make status code monitoring routine

Status codes shouldn’t be checked only after something breaks. Put the whole-site return code distribution into monthly checks: are live pages all 200, are unexpected 4xx/5xx increasing, do migrations leave residual old 301s. Investigate as soon as abnormal proportion rises — much faster than digging logs after indexing shifts. Monitoring keeps this foundation layer always transparent, so problems are seen before they affect rankings, consistent with proactive technical SEO management.

Especially after promotions, migrations, or plugin updates, status codes fluctuate most. Set these nodes as mandatory recheck points, scanning key paths’ return codes. Status codes are the grammar of your site’s conversation with engines — if the grammar is wrong, even great content doesn’t get through. Making monitoring a habit noticeably improves indexing and ranking predictability, and reduces mysterious “won’t index” phenomena.

Status codes and redirect chains

Within status codes, pay special attention to whether 3xx chains form: one 301 direct hop is best; multiple hops add latency and lose authority, and crawlers may give up midway. Periodically trace key old addresses with curl, confirming whether it’s a single hop or several hidden ones. Treating “no chains” as the health standard for redirects avoids a lot of hidden authority loss and makes post-migration acceptance easier.

Before you start, run through this round’s checklist: scan the whole site to confirm live pages all return 200; use 301 for permanent migrations with a single direct hop; return 404 or explicit 410 for dead links; investigate and fix frequent 5xx; avoid soft 404 (content missing but returning 200).