United States Postal Service at 145 North 5th Street, Montebello, California.

Don't bother calling their phone number. I tried making their life easier by suggesting I can pick up my package didn't even want to look up my package he just assumed my package wasn't there. B.S postal service I know that for sure. I filed for a case on this clerk to their website don't be lazy and do your job!

I was pleased that they were open until 6pm. All the post offices closest to my house close at 5pm. The extra hour is nice when I'm trying to get something mailed after work. Also, I do campaign work for our teachers' union PAC, and we need lots of postcard stamps at times. I had literally been to 4 post offices trying to scrounge up enough stamps. No other post offices kept enough in stock, but this one was prepared with plenty of postcard stamps. Great service too!