ASN AS27400 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS27400?

AS27400 is listed under Clearfly Communications.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS27400 Clearfly Communications

ASN Lookup Tool

Clearfly Communications clearfly.net

US 9 Routes

AS Data

AS27400

AS27400 – Clearfly Communications

AS Number	27400
AS Name	CLEARFLY
Organization	Clearfly Communications (clear-58)
Country	US
Website	clearfly.net
Number of IPv4 Routes	8
Number of IPv6 Routes	1
ASN type	ISP
Registry	ARIN
Date Allocated	2007-11-29

ASN Intelligence API for production workflows

Use ASN data for AS27400 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
208.85.63.0/24	AS27400	Clearfly Communications	Clearfly Communications	256
208.88.112.0/21	AS27400	Clearfly Communications	Clearfly Communications	2048
74.116.160.0/21	AS27400	Clearfly Communications	Clearfly Communications	2048
208.85.62.0/24	AS27400	Clearfly Communications	Clearfly Communications	256
208.85.61.0/24	AS27400	Clearfly Communications	Clearfly Communications	256
208.85.60.0/24	AS27400	Clearfly Communications	Clearfly Communications	256
2607:f3d0::/32	AS27400	Clearfly Communications	Clearfly Communications	~79×10²⁷
199.36.232.0/21	AS27400	Clearfly Communications	Clearfly Communications	2048
208.85.60.0/22	AS27400	Clearfly Communications	Clearfly Communications	1024

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       27400
ASName:         CLEARFLY
ASHandle:       AS27400
RegDate:        2007-11-29
Updated:        2020-04-24
Comment:        https://www.clearfly.net/
Ref:            https://rdap.arin.net/registry/autnum/27400


OrgName:        Clearfly Communications
OrgId:          CLEAR-58
Address:        PO Box 20009
City:           Billings
StateProv:      MT
PostalCode:     59104-0009
Country:        US
RegDate:        2007-06-28
Updated:        2021-10-01
Comment:        https://www.clearfly.net/
Ref:            https://rdap.arin.net/registry/entity/CLEAR-58


OrgNOCHandle: CLEAR3-ARIN
OrgNOCName:   CLEARFLY-NETOPS
OrgNOCPhone:  +1-866-652-7520 
OrgNOCEmail:  netops@clearfly.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN

OrgRoutingHandle: CLEAR3-ARIN
OrgRoutingName:   CLEARFLY-NETOPS
OrgRoutingPhone:  +1-866-652-7520 
OrgRoutingEmail:  netops@clearfly.net
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN

OrgTechHandle: CLEAR3-ARIN
OrgTechName:   CLEARFLY-NETOPS
OrgTechPhone:  +1-866-652-7520 
OrgTechEmail:  netops@clearfly.net
OrgTechRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN

OrgAbuseHandle: CAC73-ARIN
OrgAbuseName:   Clearfly Abuse Contact
OrgAbusePhone:  +1-866-652-7520 
OrgAbuseEmail:  abuse@clearfly.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CAC73-ARIN

OrgDNSHandle: CLEAR3-ARIN
OrgDNSName:   CLEARFLY-NETOPS
OrgDNSPhone:  +1-866-652-7520 
OrgDNSEmail:  netops@clearfly.net
OrgDNSRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN

RAbuseHandle: CAC73-ARIN
RAbuseName:   Clearfly Abuse Contact
RAbusePhone:  +1-866-652-7520 
RAbuseEmail:  abuse@clearfly.net
RAbuseRef:    https://rdap.arin.net/registry/entity/CAC73-ARIN

RTechHandle: CLEAR3-ARIN
RTechName:   CLEARFLY-NETOPS
RTechPhone:  +1-866-652-7520 
RTechEmail:  netops@clearfly.net
RTechRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN

RNOCHandle: CLEAR3-ARIN
RNOCName:   CLEARFLY-NETOPS
RNOCPhone:  +1-866-652-7520 
RNOCEmail:  netops@clearfly.net
RNOCRef:    https://rdap.arin.net/registry/entity/CLEAR3-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "27400",
    "as_handle" : "AS27400",
    "as_name" : "CLEARFLY",
    "admin_contacts" : [ "CLEAR3-ARIN" ],
    "tech_contacts" : [ "CLEAR3-ARIN", "CLEAR3-ARIN", "CLEAR3-ARIN" ],
    "abuse_contacts" : [ "CAC73-ARIN", "CAC73-ARIN" ],
    "date_created" : "2007-11-29",
    "date_updated" : "2020-04-24",
    "source" : "https://rdap.arin.net/registry/autnum/27400"
  } ],
  "organization" : {
    "handle" : "CLEAR-58",
    "name" : "Clearfly Communications",
    "address" : [ "PO Box 20009", "Billings", "MT", "59104-0009", "US" ],
    "city" : "Billings",
    "state" : "MT",
    "zip_code" : "59104-0009",
    "country" : [ "US" ],
    "date_created" : "2007-06-28",
    "date_updated" : "2021-10-01",
    "source" : "https://rdap.arin.net/registry/entity/CLEAR-58",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "CLEAR3-ARIN",
    "name" : "CLEARFLY-NETOPS",
    "email" : [ "netops@clearfly.net" ],
    "phone" : [ "+1-866-652-7520" ],
    "source" : "https://rdap.arin.net/registry/entity/CLEAR3-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "CLEAR3-ARIN",
    "name" : "CLEARFLY-NETOPS",
    "email" : [ "netops@clearfly.net" ],
    "phone" : [ "+1-866-652-7520" ],
    "source" : "https://rdap.arin.net/registry/entity/CLEAR3-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CAC73-ARIN",
    "name" : "Clearfly Abuse Contact",
    "email" : [ "abuse@clearfly.net" ],
    "phone" : [ "+1-866-652-7520" ],
    "source" : "https://rdap.arin.net/registry/entity/CAC73-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS58511	Anycast Global Backbone	AU
AS24482	SG.GS	SG
AS3786	LG DACOM Corporation	KR
AS393577	Tritan Development	US
AS401703	Ordinal Advisors LLC	US
AS6939	Hurricane Electric LLC	US
AS20473	The Constant Company, LLC	US
AS11404	Wave Broadband	US
AS64289	Macarne.com	US
AS10242	US Internet Corp	US

Upstreams

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS52025	ParadoxNetworks Limited	GB
AS7575	Australian Academic and Research Network	AU
AS394256	Tech Futures Interactive Inc.	CA
AS9002	RETN Limited	GB
AS1299	Arelion Sweden AB	SE
AS6939	Hurricane Electric LLC	US
AS3356	Level 3 Parent, LLC	US
AS32621	Twin City VoIP, Inc.	US
AS137409	GSL Networks Pty LTD	AU