ns_reverse
ActiveTool of DomainKits
Reverse NS lookup. Find all gTLD domains hosted on a specific nameserver. Useful for mapping domain portfolios, understanding the scale of a nameserver's usage, and discovering what domains share infrastructure. Best practices: - sort=length_asc surfaces the shortest (most premium) domains first — large portfolios often contain hidden short-letter gems. - pure_alpha=true is the cleanest way to filter for letter-only domains. This is stricter than no_number + no_hyphen combined, as it excludes any non-letter character. - keyword filters by substring within domain names on that nameserver — useful for finding domains in a specific niche or vertical. - min_len and max_len require exact integers (e.g., '4'), not range syntax like '<5'. - If results fill a full page (10+), check total and paginate — large nameservers may host thousands of domains. - Look for patterns in results: similar naming conventions (brand-us.com, brand-uk.com) indicate portfolio clustering by the same owner.
Parameters schema
{
"type": "object",
"required": [
"ns"
],
"properties": {
"ns": {
"type": "string",
"description": "Target nameserver hostname (e.g., 'ns1.example.com')"
},
"tld": {
"type": "string",
"description": "Filter by TLD (e.g., 'com')"
},
"page": {
"type": "string",
"description": "Page number for pagination"
},
"sort": {
"enum": [
"length_asc",
"length_desc",
"alpha_asc",
"alpha_desc"
],
"type": "string",
"description": "Sort order"
},
"keyword": {
"type": "string",
"description": "Substring filter within domain names"
},
"max_len": {
"type": "string",
"description": "Maximum domain name length (integer)"
},
"min_len": {
"type": "string",
"description": "Minimum domain name length (integer)"
},
"no_hyphen": {
"type": "string",
"description": "Exclude hyphens"
},
"no_number": {
"type": "string",
"description": "Exclude numbers"
},
"pure_alpha": {
"enum": [
"true",
"false"
],
"type": "string",
"description": "Letters only (strictest quality filter)"
},
"pure_digit": {
"enum": [
"true",
"false"
],
"type": "string",
"description": "Numbers only"
}
}
}No endpoints wrapped at confidence ≥ 0.50.
Parent server
DomainKits
https://github.com/ABTdomain/domainkits-mcp
2/7 registries