What is ASN AS398203?

ASN AS398203 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS398203?

AS398203 is listed under MidSouth Fiber.

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?

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AS398203 MidSouth Fiber | IPGeolocation.io

ASN Lookup Tool

MidSouth Fiber midsouthsynergy.com

US 5 Routes

AS Data

AS398203

AS398203 – MidSouth Fiber

AS Number	398203
AS Name	MIDSOUTH-FIBER-AS
Organization	MidSouth Fiber (mcl-2275)
Country	US
Website	midsouthsynergy.com
Number of IPv4 Routes	4
Number of IPv6 Routes	1
ASN type	ISP
Registry	ARIN
Date Allocated	2019-12-10

ASN Intelligence API for production workflows

Use ASN data for AS398203 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
142.202.164.0/22	AS398203	MidSouth Fiber	MidSouth Fiber	1024
2605:8cc0::/32	AS398203	MidSouth Fiber	MidSouth Fiber	~79×10²⁷
169.150.144.0/20	AS398203	MidSouth Fiber	MidSouth Fiber	4096
146.86.128.0/18	AS398203	MidSouth Fiber	MidSouth Fiber	16384
170.117.176.0/20	AS398203	MidSouth Fiber	MidSouth Fiber	4096

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:       398203
ASName:         MIDSOUTH-FIBER-AS
ASHandle:       AS398203
RegDate:        2019-12-10
Updated:        2019-12-10
Ref:            https://rdap.arin.net/registry/autnum/398203


OrgName:        MidSouth Fiber
OrgId:          MCL-2275
Address:        PO Box 970
City:           Navasota
StateProv:      TX
PostalCode:     77868
Country:        US
RegDate:        2019-11-04
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/MCL-2275


OrgDNSHandle: SMITH5718-ARIN
OrgDNSName:   Smith, Russell 
OrgDNSPhone:  +1-936-825-5100 
OrgDNSEmail:  rsmith@midsouthsynergy.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/SMITH5718-ARIN

OrgNOCHandle: GRAVE330-ARIN
OrgNOCName:   Graves, William 
OrgNOCPhone:  +1-281-734-3831 
OrgNOCEmail:  wgraves@midsouthsynergy.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/GRAVE330-ARIN

OrgTechHandle: SMITH5718-ARIN
OrgTechName:   Smith, Russell 
OrgTechPhone:  +1-936-825-5100 
OrgTechEmail:  rsmith@midsouthsynergy.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SMITH5718-ARIN

OrgDNSHandle: NORTH121-ARIN
OrgDNSName:   Northcut, Brandon 
OrgDNSPhone:  +1-936-825-5100 
OrgDNSEmail:  bnorthcut@midsouthsynergy.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/NORTH121-ARIN

OrgTechHandle: GRAVE330-ARIN
OrgTechName:   Graves, William 
OrgTechPhone:  +1-281-734-3831 
OrgTechEmail:  wgraves@midsouthsynergy.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GRAVE330-ARIN

OrgRoutingHandle: SMITH5718-ARIN
OrgRoutingName:   Smith, Russell 
OrgRoutingPhone:  +1-936-825-5100 
OrgRoutingEmail:  rsmith@midsouthsynergy.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/SMITH5718-ARIN

OrgNOCHandle: NORTH121-ARIN
OrgNOCName:   Northcut, Brandon 
OrgNOCPhone:  +1-936-825-5100 
OrgNOCEmail:  bnorthcut@midsouthsynergy.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NORTH121-ARIN

OrgDNSHandle: GRAVE330-ARIN
OrgDNSName:   Graves, William 
OrgDNSPhone:  +1-281-734-3831 
OrgDNSEmail:  wgraves@midsouthsynergy.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/GRAVE330-ARIN

OrgRoutingHandle: GRAVE330-ARIN
OrgRoutingName:   Graves, William 
OrgRoutingPhone:  +1-281-734-3831 
OrgRoutingEmail:  wgraves@midsouthsynergy.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/GRAVE330-ARIN

OrgTechHandle: NORTH121-ARIN
OrgTechName:   Northcut, Brandon 
OrgTechPhone:  +1-936-825-5100 
OrgTechEmail:  bnorthcut@midsouthsynergy.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NORTH121-ARIN

OrgNOCHandle: SMITH5718-ARIN
OrgNOCName:   Smith, Russell 
OrgNOCPhone:  +1-936-825-5100 
OrgNOCEmail:  rsmith@midsouthsynergy.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/SMITH5718-ARIN

OrgRoutingHandle: NORTH121-ARIN
OrgRoutingName:   Northcut, Brandon 
OrgRoutingPhone:  +1-936-825-5100 
OrgRoutingEmail:  bnorthcut@midsouthsynergy.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NORTH121-ARIN

OrgAbuseHandle: CABAL83-ARIN
OrgAbuseName:   Caballero, Melanie 
OrgAbusePhone:  +1-936-825-5121 
OrgAbuseEmail:  mcaballero@mselectric.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CABAL83-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" : "398203",
    "as_handle" : "AS398203",
    "as_name" : "MIDSOUTH-FIBER-AS",
    "admin_contacts" : [ "SMITH5718-ARIN", "NORTH121-ARIN", "GRAVE330-ARIN" ],
    "tech_contacts" : [ "SMITH5718-ARIN", "GRAVE330-ARIN", "SMITH5718-ARIN", "GRAVE330-ARIN", "NORTH121-ARIN", "NORTH121-ARIN" ],
    "abuse_contacts" : [ "CABAL83-ARIN" ],
    "date_created" : "2019-12-10",
    "date_updated" : "2019-12-10",
    "source" : "https://rdap.arin.net/registry/autnum/398203"
  } ],
  "organization" : {
    "handle" : "MCL-2275",
    "name" : "MidSouth Fiber",
    "address" : [ "PO Box 970", "Navasota", "TX", "77868", "US" ],
    "city" : "Navasota",
    "state" : "TX",
    "zip_code" : "77868",
    "country" : [ "US" ],
    "date_created" : "2019-11-04",
    "date_updated" : "2024-11-25",
    "source" : "https://rdap.arin.net/registry/entity/MCL-2275",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "SMITH5718-ARIN",
    "name" : "Smith, Russell",
    "email" : [ "rsmith@midsouthsynergy.com" ],
    "phone" : [ "+1-936-825-5100" ],
    "source" : "https://rdap.arin.net/registry/entity/SMITH5718-ARIN"
  }, {
    "handle" : "NORTH121-ARIN",
    "name" : "Northcut, Brandon",
    "email" : [ "bnorthcut@midsouthsynergy.com" ],
    "phone" : [ "+1-936-825-5100" ],
    "source" : "https://rdap.arin.net/registry/entity/NORTH121-ARIN"
  }, {
    "handle" : "GRAVE330-ARIN",
    "name" : "Graves, William",
    "email" : [ "wgraves@midsouthsynergy.com" ],
    "phone" : [ "+1-281-734-3831" ],
    "source" : "https://rdap.arin.net/registry/entity/GRAVE330-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "SMITH5718-ARIN",
    "name" : "Smith, Russell",
    "email" : [ "rsmith@midsouthsynergy.com" ],
    "phone" : [ "+1-936-825-5100" ],
    "source" : "https://rdap.arin.net/registry/entity/SMITH5718-ARIN"
  }, {
    "handle" : "GRAVE330-ARIN",
    "name" : "Graves, William",
    "email" : [ "wgraves@midsouthsynergy.com" ],
    "phone" : [ "+1-281-734-3831" ],
    "source" : "https://rdap.arin.net/registry/entity/GRAVE330-ARIN"
  }, {
    "handle" : "NORTH121-ARIN",
    "name" : "Northcut, Brandon",
    "email" : [ "bnorthcut@midsouthsynergy.com" ],
    "phone" : [ "+1-936-825-5100" ],
    "source" : "https://rdap.arin.net/registry/entity/NORTH121-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CABAL83-ARIN",
    "name" : "Caballero, Melanie",
    "email" : [ "mcaballero@mselectric.com" ],
    "phone" : [ "+1-936-825-5121" ],
    "source" : "https://rdap.arin.net/registry/entity/CABAL83-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS7195	EDGEUNO S.A.S	CO
AS8220	COLT Technology Services Group Limited	GB
AS6939	Hurricane Electric LLC	US
AS4826	Vocus Connect International Backbone	AU
AS2914	NTT America, Inc.	US
AS14537	Continent 8 LLC	US
AS14907	Wikimedia Foundation Inc.	US
AS19684	Latigo, LLC	US
AS28398	INTERNET TELEFONIA Y TV DE MICHOACAN SA DE CV	MX
AS61461	Airtek Solutions C.A.	VE

Upstreams

AS Number	Description	Country
AS8220	COLT Technology Services Group Limited	GB
AS7195	EDGEUNO S.A.S	CO
AS1299	Arelion Sweden AB	SE
AS6939	Hurricane Electric LLC	US
AS2914	NTT America, Inc.	US
AS137409	GSL Networks Pty LTD	AU

Downstreams

AS Number	Description	Country
AS46209	GHC911	US