An interesting article about telephone area codes

https://www.atlasobscura.com/articles/area-code-logic-north-american-numbering-plan?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=fc87be3d23-EMAIL_CAMPAIGN_2023_06_05&utm_medium=email&utm_term=0_-fc87be3d23-%5BLIST_EMAIL_ID%5D&mc_cid=fc87be3d23&mc_eid=9337bd4ceb