AS54764 Casting Workbook Services Inc.

CWB-01 - Casting Workbook Services Inc. · registered in Canada

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Canada#1,417largest network in CA by IPv4 space, of 1,575 · <0.01% of CA

Rank worldwide#68,505of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryCanada1,622 ASNs registered there

Open AS54764 in ASN lookup Look up an IP in this network (199.181.81.1) All networks in Canada

IPv4 prefixes

All 1 prefix, in address order.

199.181.81.0/24

Similar-sized networks in Canada

ASNNameIPv4 addresses

AS54657#1414 SPC-S-NET - Systec Computer Process Inc.256

AS54719#1415 TACE-MCC1320 - TELUS Communications Inc.256

AS54760#1416 CSPORTNEUF - Centre de services scolaire de Portneuf256

AS54783#1418 AS-CSDUROY - Commission scolaire du Chemin-du-Roy256

AS54788#1419 MGTP - Montreal Gateway Terminals Partnership256

AS54818#1420 SGW-AS-54818 - Smilegate West, Inc.256

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources