Cal I have an appointment to go there ...How would they be able to generate an appointment if they were closed?
then it works, obviously.
Article may be outdated. Many closures of consulates as counter measures of USA actions were taken here and there since 2022, some just unilaterally by host country cancelling authorizations for staff so making is impossible to keep some consulates going.
I think in the attempt to bait Russia inside a trap as well as to avoid too much damage to own's american interests, the Trump team after first visits of Witkoff to Russia, offered to relax some mutual practicalities. This consulate may have been closed under the former Biden mafia team, then reopened recently.
Appointments are done on a website of Russian foreign affairs ministry. All are under a subdomain name for the given consulate, under main domain name kdmid.ru.
There is a houston.kdmid.ru : https://houston.kdmid.ru/queue-en/
On main kdmid website list of consulate in USA: https://www.kdmid.ru/docs/usa/russian-consular-offices/