Question: I was trying to look up some locked posts to check on because of the recent feature requests, and saw that there was no **islocked:1** option.

This would help complete the set of advanced search options.

Answer: 
In case that isn't implemented, for whatever reason, you can find out if a post has ever been locked by [using the following Google Search](http://www.google.com/search?hl=en&q=site%3Astackoverflow.com+%22Post+locked+by%22&aq=f&aql=&aqi=&oq=&cad=h):

```
site:stackoverflow.com "Post locked by" -migrated

```

Type that into Google. The `-migrated` allows you to omit posts with the word 'migrated' in them (for those posts that are locked due to migration).

You can also try "`Locked By Jeff Atwood`" (or any of the moderator Names) to see ones that may slip through, but this should catch most of them.
This got implemented a while back when we switched over to using Elasticsearch.

To search for locked posts, use `locked:1`.