Responding swiftly to the great demand to tickets and the high volume of calls since tickets went on sale 10 AM today (July 23), the people behind comedian Jerry Seinfeld's Aug. 5-9 one-man Broadway show have created a second phone line through which tickets will be sold. The new number is 1-800-525-2929. The first phone number remains (212) 563-5544. All tickets are $75 and there is a two ticket limit per person. Tickets sales are by phone only.

Seinfeld will hold 10 concerts in all. Each date, from Wednesday, Aug. 5, to Saturday, Aug. 8, will feature two concerts each, at 7 PM and 10 PM. Shows on Sunday, Aug. 9, will be at 5 PM and 9 PM. The latter concert will be broadcast live on HBO. (Doors at the Broadhurst Theatre will close at 8:45 PM sharp.)

Seinfeld will donate his income from the concerts to programs benefiting students in the New York City public schools. The money will be distributed through Public Education Needs Civic Involvement in Learning (PENCIL) and ArtsConnection. If the daily inquiries fielded by Playbill On-Line are any indication, demand for the shows at the Broadhurst Theatre will be high. Seinfeld's Broadway bow, titled Jerry Seinfeld Live: I'm Telling You for the Last Time, is produced and directed by Marty Callner. Seinfeld is the executive producer. The Broadhurst seats 1,186 people.

Seinfeld is preceding the New York concert series with what may amount to the most far-flung pre-Broadway tour in history. He began with a booking in Australia, where he staged a handful of June performances in Melbourne and Sydney. The globe-trotting comic followed that booking with dates in Sweden (July 3-4), Iceland (July 8-9) and London (July 12).

Warmup gigs are include San Antonio (July 17-19 at the Majestic Theatre), Omaha (July 24-25 at the Orpheum Theatre) and Des Moines (July 31 Aug. 1 at the Civic Center).